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Graph whose biconnected components are all cliques
In graph theory, a branch of combinatorial mathematics, a block graph or clique tree is a type of undirected graph in which every biconnected component
Block_graph
Appendix:Glossary of graph theory in Wiktionary, the free dictionary. This is a glossary of graph theory. Graph theory is the study of graphs, systems of nodes
Glossary_of_graph_theory
Maximal biconnected subgraph
In graph theory, a biconnected component or block (sometimes known as a 2-connected component) is a maximal biconnected subgraph. Any connected graph decomposes
Biconnected_component
Class of artificial neural networks
Graph neural networks (GNNs) are artificial neural networks designed for tasks whose inputs are graphs. Because graphs usually do not have a canonical
Graph_neural_network
Mathematical tree of cycles
it is a connected graph in which every edge belongs to at most one simple cycle, or (for nontrivial cacti) in which every block (maximal subgraph without
Cactus_graph
Graphical representation of a computer program or algorithm
flow graph is the directed graph of the basic blocks of the function (the nodes of the graph) and the control flow between them (the edges of the graph).
Control-flow_graph
Adjacent subset of an undirected graph
cluster graph is a graph whose connected components are cliques. A block graph is a graph whose biconnected components are cliques. A chordal graph is a
Clique_(graph_theory)
Graph representing intersections between given sets
In graph theory, an intersection graph is a graph that represents the pattern of intersections of a family of sets. Any graph can be represented as an
Intersection_graph
Concept in network science
The stochastic block model is a generative model for random graphs. This model tends to produce graphs containing communities, subsets of nodes characterized
Stochastic_block_model
self-complementary graph, a block graph, a split graph, an interval graph, a claw-free graph, a 1-vertex-connected graph and a 1-edge-connected graph. A graph is bull-free
Bull_graph
Graph representing edges of another graph
In the mathematical discipline of graph theory, the line graph of an undirected graph G is another graph L(G) that represents the adjacencies between edges
Line_graph
Flow graph invented by Claude Shannon
A signal-flow graph or signal-flowgraph (SFG), invented by Claude Shannon, but often called a Mason graph after Samuel Jefferson Mason who coined the
Signal-flow_graph
Graph where all long cycles have a chord
In the mathematical area of graph theory, a chordal graph is one in which all cycles of four or more vertices have a chord, which is an edge that is not
Chordal_graph
Graphs whose distances obey Ptolemy's inequality
graphs are exactly the graphs that are both chordal and distance-hereditary; they include the block graphs and are a subclass of the perfect graphs.
Ptolemaic_graph
Matrix representation of a graph
In the mathematical field of graph theory, the Laplacian matrix, also called the graph Laplacian, admittance matrix, Kirchhoff matrix, or discrete Laplacian
Laplacian_matrix
Graph made from disjoint union of complete graphs
relation. Every cluster graph is a block graph, a cograph, and a claw-free graph. Every maximal independent set in a cluster graph chooses a single vertex
Cluster_graph
Graph whose shortest paths are unique
In graph theory, a geodetic graph is an undirected graph such that there exists a unique (unweighted) shortest path between each two vertices. Geodetic
Geodetic_graph
Mathematical graph of a Sudoku
block of the puzzle. The problem of solving a Sudoku puzzle can be represented as precoloring extension on this graph. It is an integral Cayley graph
Sudoku_graph
Topics referred to by the same term
Look up Block, Blocks, block, blocked, or blocks in Wiktionary, the free dictionary. Block or blocked may refer to: Block programming, the result of a
Block
Cryptocurrency
The Graph is an open-source, decentralized protocol that powers the indexing and querying of blockchain data. It enables developers to build scalable
The_Graph
In graph theory, a quotient graph Q of a graph G is a graph whose vertices are blocks of a partition of the vertices of G and where block B is adjacent
Quotient_graph
Number of vertices with unambiguous distances
In graph theory, the metric dimension of a graph G is the minimum cardinality of a subset S of vertices such that all other vertices are uniquely determined
Metric dimension (graph theory)
Metric_dimension_(graph_theory)
Directed graph with no directed cycles
In mathematics, particularly graph theory, and computer science, a directed acyclic graph (DAG) is a directed graph with no directed cycles. That is, it
Directed_acyclic_graph
Graph generated by a random process
In mathematics, random graph is the general term to refer to probability distributions over graphs. Random graphs may be described simply by a probability
Random_graph
Graph family made by joining complete graphs at a universal node
complete graphs from which it is formed, it is (k − 1)-edge-connected. It is trivially perfect and a block graph. By construction, the windmill graph Wd(3
Windmill_graph
classes of block graphs: Block graphs having all cut vertices in a single block Block graphs in which cut vertices induce a star Block graphs in which cut
Imbalance_conjecture
Writing paper with a grid
Graph paper, coordinate paper, grid paper, or squared paper is writing paper that is printed with fine lines making up a regular grid. It is available
Graph_paper
Two closely related models for generating random graphs
the mathematical field of graph theory, the Erdős–Rényi models are two closely related models for generating random graphs and the evolution of a random
Erdős–Rényi_model
attached to are known. The graph to the left shows the progress of an inner decoder. The x-axis plots the number of check blocks received and the dashed
Online_codes
Graph path which is an induced subgraph
connected block graphs are the graphs in which there is exactly one induced path between every two vertices. It is NP-complete to determine, for a graph G and
Induced_path
veto core. Their algorithm is based on blocking graphs. The blocking graph for an outcome x is a bipartite graph with r*n vertices on one side (r vertices
Veto_voting
Code sequence with no branches except at entry and exit
Basic blocks form the vertices or nodes in a control-flow graph. The code in a basic block has: One entry point, meaning that no code within it is the
Basic_block
Approximate nearest neighbor search algorithm
datasets. HNSW stores vectors in a graph. Each vector is a node, and links connect it to some nearby vectors. The graph has several layers: upper layers
Hierarchical navigable small world
Hierarchical_navigable_small_world
Edge whose deletion would disconnect a graph
In graph theory, a bridge, isthmus, cut-edge, or cut arc is an edge of a graph whose deletion increases the graph's number of connected components. Equivalently
Bridge_(graph_theory)
Type of graph related to pursuit–evasion
In graph theory, a cop-win graph is an undirected graph on which the pursuer (cop) can always win a pursuit–evasion game against a robber, with the players
Cop-win_graph
Infinite graph containing all countable graphs
In the mathematical field of graph theory, the Rado graph, Erdős–Rényi graph, or random graph is a countably infinite graph that can be constructed (with
Rado_graph
mathematical graph theory, the Higman–Sims graph is a 22-regular undirected graph with 100 vertices and 1100 edges. It is the unique strongly regular graph srg(100
Higman–Sims_graph
Function type in graph theory
In graph theory and statistics, a graphon (also known as a graph limit) is a symmetric measurable function W : [ 0 , 1 ] 2 → [ 0 , 1 ] {\displaystyle
Graphon
API for graph data and graph operations
GraphBLAS (/ˈɡræfˌblɑːz/ ) is an API specification that defines standard building blocks for graph algorithms in the language of linear algebra. GraphBLAS
GraphBLAS
Graph in comparative genomics
Sequence graph, also called an alignment graph, breakpoint graph, or adjacency graph, are bidirected graphs used in comparative genomics. The structure
Sequence_graph
Mathematical graph relating to chess
In graph theory, a knight's graph, or a knight's tour graph, is a graph that represents all legal moves of the knight chess piece on a chessboard. Each
Knight's_graph
Graph where every edge is in one triangle
In graph theory, a locally linear graph is an undirected graph in which every edge belongs to exactly one triangle. Equivalently, for each vertex of the
Locally_linear_graph
Graphical system analysis method
block inputs, and block outputs to output variables as well as inputs of other blocks. Black box Bond graph Data flow diagram Functional flow block diagram
Block_diagram
Tree node with two other nodes as descendants
In graph theory and computer science, the lowest common ancestor (LCA) (also called least common ancestor) of two nodes v and w in a tree or directed
Lowest_common_ancestor
Graphical representation of energy flows in physical systems
A bond graph is a graphical representation of the energy flows though and between physical dynamical systems including those in the electrical, mechanical
Bond_graph
Clustering and community detection algorithm
well-connected. Consider, for example, the following graph: Three communities are present in this graph (each color represents a community). Additionally
Leiden_algorithm
Method of finding a directed graph's strongly connected components
transpose graph (the same graph with the direction of every edge reversed) has exactly the same strongly connected components as the original graph. The primitive
Kosaraju's_algorithm
Dimensionality reduction of graph-based semantic data objects [machine learning task]
In representation learning, knowledge graph embedding (KGE), also called knowledge representation learning (KRL), or multi-relation learning, is a machine
Knowledge_graph_embedding
Perfect graphs have neither odd holes nor odd antiholes
In graph theory, the strong perfect graph theorem is a forbidden graph characterization of the perfect graphs as being exactly the graphs that have neither
Strong_perfect_graph_theorem
Japanese physicist
one cycle) and block graphs (the graphs in which, for every cycle, all diagonals of the cycle are edges). Husimi studied cactus graphs in a 1950 paper
Kôdi_Husimi
Generalization of dominating sets using fractional weights
_{f}(W_{n})=1} Several graph classes have γ f ( G ) = γ ( G ) {\displaystyle \gamma _{f}(G)=\gamma (G)} : Trees Block graphs (graphs where every block is complete)
Fractional_dominating_set
Method of analyzing variables in software
control-flow graph can then be topologically sorted; running in the order of this sort, the entry states can be computed at the start of each block, since all
Data-flow_analysis
Knowledge base that represents semantic relations between concepts in a network
used as a form of knowledge representation. It is a directed or undirected graph consisting of vertices, which represent concepts, and edges, which represent
Semantic_network
Graph with tight clique-coloring relation
In graph theory, a perfect graph is a graph in which the chromatic number equals the size of the maximum clique, both in the graph itself and in every
Perfect_graph
Type of graph
In graph theory, a biconnected graph is a connected and "nonseparable" graph, meaning that if any one vertex were to be removed, the graph will remain
Biconnected_graph
Strongly regular graph
elements and 6-element blocks with each triple of elements covered by exactly one block). In this construction, the 231 vertices of the graph correspond to the
Cameron_graph
Matrix that shows the relationship between two classes of objects
common graph representation in graph theory. It is different to an adjacency matrix, which encodes the relation of vertex-vertex pairs. In graph theory
Incidence_matrix
Bipartite graph in coding theory
Tanner graph is a bipartite graph that can be used to express constraints (typically equations) that specify an error correcting code. Tanner graphs play
Tanner_graph
Longest distance between tree vertices
In graph theory, the triameter is a metric invariant that generalizes the concept of a graph's diameter. It is defined as the maximum sum of pairwise
Triameter_(graph_theory)
Mathematical abstraction of level sets
A Reeb graph (named after Georges Reeb by René Thom) is a mathematical object reflecting the evolution of the level sets of a real-valued function on
Reeb_graph
Graph where most nodes are reachable in a small number of steps
network example Hubs are bigger than other nodes A small-world network is a graph characterized by a high clustering coefficient and low distances. In an
Small-world_network
Python library for graphs and networks
NetworkX is a Python library for studying graphs and networks. NetworkX is free software released under the BSD-new license. NetworkX began development
NetworkX
Network whose degree distribution follows a power law
transformation which converts random graphs to their edge-dual graphs (or line graphs) produces an ensemble of graphs with nearly the same degree distribution
Scale-free_network
Graph whose induced subgraphs preserve distance
In graph theory, a branch of discrete mathematics, a distance-hereditary graph (also called a completely separable graph) is a graph in which the distances
Distance-hereditary_graph
Analysis of social structures using network and graph theory
process of investigating social structures through the use of networks and graph theory. It characterizes networked structures in terms of nodes (individual
Social_network_analysis
Symmetric arrangement of finite sets
are quasisymmetric. Every quasisymmetric block design gives rise to a strongly regular graph (as its block graph), but not all SRGs arise in this way. The
Combinatorial_design
Mathematical theory on behavior of connected clusters in a random graph
bottom? Similarly, one can ask, given a connected graph at what fraction 1 – p of failures the graph will become disconnected (no large component). The
Percolation_theory
Problem of finding the longest simple path for a given graph
In graph theory and theoretical computer science, the longest path problem is the problem of finding a simple path of maximum length in a given graph. A
Longest_path_problem
Compiler optimization technique
dependency graph is a directed acyclic graph. Then, any topological sort of this graph is a valid instruction schedule. The edges of the graph are usually
Instruction_scheduling
tree problem. Feedback vertex set Feedback arc set Graph coloring Graph homomorphism problem Graph partition into subgraphs of specific types (triangles
List_of_NP-complete_problems
Standard hostname for a networked device's loopback interface
display its home page. IPv4 network standards reserve the entire address block 127.0.0.0/8 (more than 16 million addresses) for loopback purposes. That
Localhost
Study of graphs defined by geometric means
Geometric graph theory in the broader sense is a large and amorphous subfield of graph theory, concerned with graphs defined by geometric means. In a stricter
Geometric_graph_theory
Strongly regular graph
The M22 graph, also called the Mesner graph or Witt graph, is the unique strongly regular graph with parameters (77, 16, 0, 4). It is constructed from
M22_graph
Method for finding largest (or smallest) eigenvalues
Locally Optimal Block Preconditioned Conjugate Gradient (LOBPCG) is a matrix-free method for finding the largest (or smallest) eigenvalues and the corresponding
LOBPCG
Mathematical sequence
"An Extension of the Prüfer Code and Assembly of Connected Graphs from Their Blocks". Graphs and Combinatorics. 19 (2): 231–239. doi:10.1007/s00373-002-0499-3
Prüfer_sequence
Community development block in West Bengal, India
Baduria is a community development block that forms an administrative division in Basirhat subdivision of North 24 Parganas district in the Indian state
Baduria (community development block)
Baduria_(community_development_block)
Community development block in West Bengal, India
Bagdah (also spelled Bagda) is a community development block that forms an administrative division in Bangaon subdivision of North 24 Parganas district
Bagdah (community development block)
Bagdah_(community_development_block)
Type of chart
A bar chart or bar graph is a chart or graph that presents categorical data with rectangular bars with heights or lengths proportional to the values that
Bar_chart
Concept in graph theory
Such benchmark graphs are a special case of the planted l-partition model of Condon and Karp, or more generally of "stochastic block models", a general
Community_structure
Degree of connectedness within a graph
In graph theory and network analysis, indicators of centrality assign numbers or rankings to nodes within a graph corresponding to their network position
Centrality
Directed graph used for deadlock detection
algorithm makes use of a wait-for graph to track which other processes a process is currently blocking on. In a wait-for graph, processes are represented as
Wait-for_graph
Algorithm to search the nodes of a graph
tree or graph data structures. The algorithm starts at the root node (selecting some arbitrary node as the root node in the case of a graph) and explores
Depth-first_search
Community development block in West Bengal, India
Haroa is a community development block that forms an administrative division in Basirhat subdivision of North 24 Parganas district in the Indian state
Haroa (community development block)
Haroa_(community_development_block)
Expression of thought in material symbols
Graphism is the expression of thought in material symbols. Graphism began some 30,000 years BC, not as a photographic representation of reality but as
Graphism
Social networking service owned by Meta Platforms
that "Facebook was surprised we were able to suck out the whole social graph, but they didn't stop us once they realised that was what we were doing"
In graph theory, the mathematically simplest spatial network
In graph theory, a random geometric graph (RGG) is the mathematically simplest spatial network, namely an undirected graph constructed by randomly placing
Random_geometric_graph
Community development block in West Bengal, India
Rajarhat is a community development block that forms an administrative division in Bidhannagar subdivision of North 24 Parganas district in the Indian
Rajarhat (community development block)
Rajarhat_(community_development_block)
Algorithm for computing the maximal flow of a network
shortest augmenting paths. The introduction of the concepts of the level graph and blocking flow enable Dinic's algorithm to achieve its performance. Dinitz invented
Dinic's_algorithm
Computational problem in graph theory
In graph theory and combinatorial optimization, a closure of a directed graph is a set of vertices C, such that no edges leave C. The closure problem is
Closure_problem
Abstract mathematical system of two types of objects and a relation between them
use geometric terminology, but in graph theory they are hypergraphs and in combinatorial design theory they are block designs. They are also known as a
Incidence_structure
Mixing property of Markov chains and graphs
In theoretical computer science, graph theory, and mathematics, the conductance is a parameter of a Markov chain that is closely tied to its mixing time
Conductance_(graph_theory)
Measure of the structural complexity of a software program
look at its control-flow graph, a directed graph containing the basic blocks of the program, with an edge between two basic blocks if control may pass from
Cyclomatic_complexity
combinatorics, algebraic, differential, discrete and Euclidean geometries, graph theory, group theory, mathematical logic, number theory, set theory, Ramsey
List of unsolved problems in mathematics
List_of_unsolved_problems_in_mathematics
Community development block in West Bengal, India
English Bazar is a community development block that forms an administrative division in Malda Sadar subdivision of Malda district in the Indian state
English Bazar (community development block)
English_Bazar_(community_development_block)
Unsolved problem in computational complexity theory
computer science Can the graph isomorphism problem be solved in polynomial time? More unsolved problems in computer science The graph isomorphism problem is
Graph_isomorphism_problem
Problem on triangles in graph theory
infinitely many graphs for which τ ( G ) = 2 ν ( G ) {\displaystyle \tau (G)=2\nu (G)} , including all of the block graphs whose blocks are cliques of
Tuza's_conjecture
Mathematical framework for identifying causal effects
{\displaystyle Y} and Z {\displaystyle Z} are d-separated in a graph modified to block paths through Z {\displaystyle Z} . Do-calculus can be applied
Do-calculus
Periodic spatial graph
Laves graph is an infinite and highly symmetric system of points and line segments in three-dimensional Euclidean space, forming a periodic graph. Three
Laves_graph
Process by which people befriend similar people
policies have a decreased influence on fertility rates in such populations. In graph representation learning, homophily means that nodes with the same label
Homophily
vertex set of the graph. A partition is equitable if for any pair of vertices u and v in the same block of the partition and any block B of the partition
Fractional_graph_isomorphism
BLOCK GRAPH
BLOCK GRAPH
Surname or Lastname
Scottish and English
Scottish and English : from Middle English blak(e) ‘black’ (Old English blæc, blaca), a nickname given from the earliest times to a swarthy or dark-haired man.Scottish and English : from Old English blÄc ‘pale’, ‘fair’, i.e. precisely the opposite meaning to 1, and a variant of Blake 2. Blake and Black are found more or less interchangeably in several surnames and place names.English : variant of Blanc as a Norman name. The pronunciation of the nasalized vowel gave considerable difficulty to English speakers, and its quality was often ignored.Scottish and Irish : translation of various names from Gaelic dubh ‘black’ (see Duff).Danish and Swedish : generally, probably the English and Scottish name, but in some cases perhaps a variant spelling of Blak, a nickname from blak ‘black’.In some cases, a translation of various names meaning ‘black’, for example German and Jewish Schwarz.
Male
English
Surname transferred to forename use, derived from Old English brocc BROCK means "badger."
Surname or Lastname
English
English : of uncertain origin; possibly a nickname for someone with thick curly hair, from Old French floc ‘stable of wool’. Alternatively, it may be a metonymic occupational name for a shepherd, from Old English flocc ‘herd’, ‘company’.German : unexplained.German (Flöck) : variant of Flück (see Fluck), or from a pet form of a personal name formed with Old Saxon flÅd ‘flood’.
Surname or Lastname
English
English : topographic name for someone who lived on a small plot of land, from Middle English plocke ‘small piece of ground’.Americanized spelling of German Ploch.Variant of German Block.
Surname or Lastname
German
German : nickname for a man with some fancied resemblance to a he-goat, Middle High German boc, or a habitational name from a house distinguished by the sign of a goat.Altered spelling of German Böck (see Boeck) or Bach.Jewish (Ashkenazic) : ornamental name from German Bock ‘he-goat’.English : variant of Buck.
Boy/Male
Muslim
Black
Boy/Male
Muslim
Black
Boy/Male
American, Anglo, British, English
Dark; Dark Skinned
Surname or Lastname
English, Scottish, and North German
English, Scottish, and North German : variant of Brook.English, Scottish, and Scandinavian : nickname for a person supposedly resembling a badger, Middle English broc(k) (Old English brocc) and Danish brok (a word of Celtic origin; compare Welsh broch, Cornish brogh, Irish broc). In the Middle Ages badgers were regarded as unpleasant creatures.English : nickname from Old French broque, brock ‘young stag’.Dutch : from a personal name, a short form of Brockaert .South German : nickname for a stout and strong man from Middle High German brocke ‘lump’, ‘piece’.Jewish (Ashkenazic) : probably an acronymic family name from Jewish Aramaic bar- or Hebrew ben- ‘son of’, and the first letter of each part of a Yiddish double male personal name. Compare Brill.Jewish (from Poland) : habitational name from Brok, a place in Poland.
Male
English
The Badger
Surname or Lastname
German and Dutch
German and Dutch : from Middle High German bloch, Middle Dutch blok ‘block of wood’, ‘stocks’. The surname probably originated as a nickname for a large, lumpish man, or perhaps as a nickname for a persistent lawbreaker who found himself often in the stocks.English : possibly a metonymic occupational name for someone who blocks, as in shoemaking and bookbinding, from Middle English blok ‘block’.Jewish (Ashkenazic) : Americanized spelling of Bloch (see Vlach).Adriaen Coertsz Block was a Dutch-born merchant-explorer who traded along the CT coast and Long Island shortly after Hudson’s voyage to the region in 1609. Block Island, between the north fork of Long Island and RI, which he used as a base of operations, is named after him.
Boy/Male
English
Dark.
Boy/Male
American, Australian, British, Chinese, Christian, English, German, Indian, Irish
Stream; Badger
Girl/Female
Australian, Christian, Finnish, German, Latin, Swedish
Jet Black; Black Germ; Jet-black Gemstone; Coal Black
Boy/Male
German American English
Boy/Male
British, English, Irish
Woods; Fortified Place; Bright; Radiant
Surname or Lastname
English
English : unexplained; possibly from Middle English bleik, blek(e) ‘pallid’, ‘sallow’ (from Old Norse bleikr ‘pale’) with alteration of the vowel, although Reaney suggests it may be a nickname derived from Middle English blikie(n) ‘to shine or gleam’ (from Old English blīcian).Jewish (Ashkenazic) : origin uncertain; possibly from German Blick or Yiddish blik ‘glance’, ‘look’, and based on some now irrecoverable anecdote.German : Prussian variant of Blek, a nickname from Middle High German blic ‘shine’.German : short form of the Low German occupational name Blickslager ‘tinsmith’. Compare Bleck.German : from a short form of the Germanic personal name Bligger, Blickhart, based on blic ‘gleam’, ‘shine’, later ‘pale’.
Surname or Lastname
English
English : metonymic occupational name for a locksmith, from Middle English, Old English loc ‘lock’, ‘fastening’.English : topographic name for someone who lived near an enclosure, a place that could be locked, Middle English loke, Old English loca (a derivative of loc as in 1). Middle English loke also came to be used to denote a barrier, in particular a barrier on a river which could be opened and closed at will, and, by extension, a bridge. The surname may thus also have been a metonymic occupational name for a lock-keeper.English, Dutch, and German : nickname for a person with fine hair, or curly hair, from Middle English loc, Middle High German lock(e) ‘lock (of hair)’, ‘curl’.Americanized spelling of German Loch.
Boy/Male
Native American
Black.
Girl/Female
Muslim
Clock
BLOCK GRAPH
BLOCK GRAPH
Boy/Male
Indian, Tamil
God Murugan
Girl/Female
Hindu, Indian, Tamil
Offering Made to God
Female
English
Variant spelling of English Abigail, ABAGAIL means "father rejoices."
Girl/Female
Irish American Latin
Olive.
Girl/Female
Assamese, Indian
Light of Moon
Girl/Female
Hindu, Indian, Nepali, Tamil
Belongs to Music Terms
Boy/Male
Arabic
Tall; Handsome
Male
Norse
Old Norse name composed of the elements �ss "god" and geirr "spear," hence "god-spear." Equivalent to Old High German Ansgar.
Boy/Male
Bengali, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi
Lord Vishnu
Boy/Male
Hindu
Of variegated color
BLOCK GRAPH
BLOCK GRAPH
BLOCK GRAPH
BLOCK GRAPH
BLOCK GRAPH
a.
Black as jet; deep black.
n.
The striking of a clock.
n.
To secure or support by means of blocks; to secure, as two boards at their angles of intersection, by pieces of wood glued to each.
v. t.
A piece of wood more or less bulky; a solid mass of wood, stone, etc., usually with one or more plane, or approximately plane, faces; as, a block on which a butcher chops his meat; a block by which to mount a horse; children's playing blocks, etc.
a.
As black as coal; jet black; very black.
a.
Having black eyes.
n.
A black garment or dress; as, she wears black
v. t.
A section of a railroad where the block system is used. See Block system, below.
n.
A black pigment or dye.
a.
In a less literal sense: Enveloped or shrouded in darkness; very dark or gloomy; as, a black night; the heavens black with clouds.
v. t.
Any obstruction, or cause of obstruction; a stop; a hindrance; an obstacle; as, a block in the way.
v. t.
To lock, or fasten as with a lock.
n.
A lock of wool or hair.
n.
A negro; a person whose skin is of a black color, or shaded with black; esp. a member or descendant of certain African races.
n.
To shape on, or stamp with, a block; as, to block a hat.
a.
To make black; to blacken; to soil; to sully.
v. t.
To flock to; to crowd.
n.
Mourning garments of a black color; funereal drapery.