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cloud fraction of one means the pixel is completely covered with clouds, while a cloud fraction of zero represents a totally cloud free pixel. Cloud fraction
Cloud_fraction
Fraction of the sky obscured by clouds when observed from a particular location
Cloud cover (also known as cloudiness, cloudage, or cloud amount) refers to the fraction of the sky obscured by clouds on average when observed from a
Cloud_cover
Visible mass of particles suspended in the atmosphere
Archived 29 May 2010 at the Wayback Machine at earthobservatory.nasa.gov "Cloud Fraction : Global Maps". nasa.gov. Retrieved 26 October 2014. This article incorporates
Cloud
Systems that categorize the world's climates
25 February 2008. Retrieved 16 March 2008. "Cloud Fraction (1 month – Terra/MODIS) – NASA". Cloud Fraction (1 month – Terra/MODIS) – NASA. Retrieved 18
Climate_classification
Areas of low precipitation on the subtropical oceans
precipitating clouds. Unlike continental deserts, oceanic deserts maintain a relatively high cloud fraction throughout the year. Despite the pronounced cloud cover
Oceanic_deserts
Feedback between climate change and the effect of clouds on radiation
A cloud feedback is a climate change feedback where some aspects of cloud characteristics (e.g. cloud cover, composition or height) are altered due to
Cloud_feedback
Paradox concerning water on early Earth
Another proposed mechanism of cloud cover reduction relates a decrease in cosmic rays during this time to reduced cloud fraction. However, this mechanism does
Faint_young_Sun_paradox
4-atom allotrope of oxygen
O2-O2 absorption bands can be used to calculate cloud properties such as cloud-top pressure and cloud fraction globally. The same absorption features, including
Tetraoxygen
Distant planetesimals in the Solar System
The Oort cloud (pronounced /ɔːrt/ ORT or /ʊərt/ OORT), sometimes called the Öpik–Oort cloud, is theorized to be a cloud of billions of icy planetesimals
Oort_cloud
Music genre
Cloud rap (also known as trillwave) is a subgenre of hip-hop that emerged from the Southern hip-hop scene in the late 2000s to early 2010s. The style
Cloud_rap
Study of the physical processes in atmospheric clouds
instruments to produce continuous, vertical profiles of cloud fraction and water and ice cloud properties, supported by standardized Cloudnet processing
Cloud_physics
Cloud of debris and smoke from a large explosion
A mushroom cloud is a distinctive mushroom-shaped flammagenitus cloud of debris, smoke, and usually condensed water vapour resulting from a large explosion
Mushroom_cloud
Weather modification that condenses clouds to cause rainfall
challenges, given the difficulty of determining the fraction of extra water procured by cloud seeding. Cloud seeding has been the focus of many theories based
Cloud_seeding
Cloud formation occurring at the base of a thunderstorm
to the storm's cloud base. Wall clouds can be anywhere from a fraction of 1 mi (1.6 km) wide to over 5 mi (8 km) across. Wall clouds form in the inflow
Wall_cloud
Conversion of energy from sunlight into electricity
inevitable?" (PDF). University of Exeter. Retrieved 2 October 2023. "Daytime Cloud Fraction Coast lines evident". Archived from the original on 22 August 2017.
Solar_power
Two dwarf galaxies orbiting the Milky Way
The Magellanic Clouds (Magellanic system or Nubeculae Magellani) are two irregular dwarf galaxies in the southern celestial hemisphere. Orbiting the Milky
Magellanic_Clouds
Weather phenomenon involving electrostatic discharge
Intra-cloud (IC) or in-cloud – Within a single thundercloud Cloud-to-cloud (CC) or inter-cloud – Between two clouds Cloud-to-ground (CG) – Between a cloud and
Lightning
Type of interstellar cloud
A molecular cloud—sometimes called a stellar nursery if star formation is occurring within—is a type of interstellar cloud of which the density and size
Molecular_cloud
Streaming of video games as video to clients via cloud computing
{{{1}}} Cloud gaming, sometimes called gaming on demand or game streaming, is a type of online gaming that runs video games on remote servers and streams
Cloud_gaming
2000 video game
Dark Cloud is an action role-playing video game developed by Level-5 and published by Sony Computer Entertainment for the PlayStation 2. Originally intended
Dark_Cloud
assuming that clouds form at 100% relative humidity, the cloud fraction can be related to a critical relative humidity of 70% for stratus-type clouds, and at
Parametrization (atmospheric modeling)
Parametrization_(atmospheric_modeling)
Distant flashes of cloud-to-ground lightning from a cumulonimbus
out the sound - in these cases some fraction of the light emanating from distant thunderstorms (whose distant clouds may be so low to the horizon as to
Heat_lightning
Weather prediction using mathematical models of the atmosphere and oceans
form when the relative humidity reaches some prescribed value. The cloud fraction can be related to this critical value of relative humidity. The amount
Numerical_weather_prediction
Gas layer surrounding Earth
climate conditions that allow life to exist and evolve on Earth. By mole fraction (i.e., by quantity of molecules), dry air contains 78.08% nitrogen, 20
Atmosphere_of_Earth
Separation of stable isotopes by their mass during unidirectional processes
Kinetic fractionation is an isotopic fractionation process that separates stable isotopes from each other by their mass during unidirectional processes
Kinetic_fractionation
US Department of Energy scientific facility
and cloud fraction, the Global Energy and Water Exchanges (GEWEX) Cloud Systems Study showed “reasonable agreement” between ARM millimeter cloud radar
Atmospheric Radiation Measurement User Facility
Atmospheric_Radiation_Measurement_User_Facility
Fraction of incoming sunlight reflected by clouds
Cloud albedo is a measure of the albedo or reflectivity of a cloud. Clouds regulate the amount of solar radiation absorbed by a planet and its solar surface
Cloud_albedo
Aerosol nucleation experiment at CERN
concentrations and cloud formation in good agreement with observations. CLOUD insofar allows to explain a large fraction of cloud seeds in the lower atmosphere
CLOUD_experiment
Group of stars
30% of cloud mass is converted to stars before the cloud is dispersed, but this fraction may be higher in particularly dense parts of the cloud. With the
Star_cluster
mass fraction (in commercial contexts often called weight fraction), by mole fraction (fraction of atoms by numerical count, or sometimes fraction of molecules
Abundance of the chemical elements
Abundance_of_the_chemical_elements
Atmospheric phenomenon that occurs in idealised simulations
substantially in the domain-mean when convection is aggregated and the high-cloud fraction is decreased. Especially the clear-sky drying increases the outgoing
Convective_self-aggregation
Topics referred to by the same term
(river morphology), a deposit of sediment Bar (tropical cyclone), a layer of cloud Bar (galaxy), a feature of many spiral galaxies Bar (unit), a unit of pressure
Bar
Mathematical model of atmospheric motions
assuming that clouds form at 100% relative humidity, the cloud fraction can be related to a critical relative humidity of 70% for stratus-type clouds, and at
Atmospheric_model
Suspension of fine solid particles or liquid droplets in a gas
high altitudes, absorb heat and may be responsible for inhibiting storm cloud formation. In everyday language, aerosol often refers to a dispensing system
Aerosol
Instrument on the European Space Agency's Envisat satellite
(PDF) on 2011-08-17. Muller, J.-P.; et al. (2007). "Stereo cloud-top heights and cloud fraction retrieval from ATSR-2". International Journal of Remote Sensing
AATSR
Galaxy with unusual molecular clouds
2-17.9 km per second). Theses molecular clouds are giant compared to the galaxy taking up a significant fraction of its mass. What makes them more unusual
NGC_5064
Information technology paradigm
information technology (IT) paradigm that combines the core concept of cloud computing with the capabilities of end devices (personal computers, mobile
Dew_computing
Brightest star in the constellation Aquila
velocity at the equator of approximately 286 km/s. This is a significant fraction of the star's estimated breakup speed of 400 km/s. A study with the Palomar
Altair
Open source web server and a reverse proxy server
software, released under the terms of the 2-clause BSD license. A large fraction of web servers use nginx, often as a load balancer. A company of the same
Nginx
SI unit of time
fractions of a second is a 1-gigahertz microprocessor that has a cycle time of 1 nanosecond. Camera shutter speeds are often expressed in fractions of
Second
Area of the Solar System beyond the planets, comprising small bodies
together with the members of the scattered disc and any potential Hills cloud or Oort cloud objects, are collectively referred to as trans-Neptunian objects
Kuiper_belt
Separation technique to characterize the size of colloidal particles
Field-flow fractionation, abbreviated FFF, is a separation technique invented by J. Calvin Giddings. The technique is based on separation of colloidal
Field_flow_fractionation
Anti-particle to the electron
physical description.[citation needed] Beginning in 1923, while using a Wilson cloud chamber to study the Compton effect, Dmitri Skobeltsyn observed tracks that
Positron
Vast, theoretical circumstellar disc
the dynamics of the Oort cloud: Oort cloud comets are continually perturbed in their environment. A non-negligible fraction leaves the Solar System, or
Hills_cloud
Fair division protocol in computing
particularly useful for dividing computing resources in among users in cloud computing environments, where each user may require a different combination
Dominant_resource_fairness
Maria R. (8 September 2020). "The Red Supergiant Binary Fraction of the Large Magellanic Cloud". The Astrophysical Journal. 900 (2): 118. arXiv:2007.15852
List_of_largest_stars
part of a number Edward Meeker 1913 1693 School Series — Ten problems in fractions Edward Meeker 1913 1694 School Series — Twelve problems in business practice
List of Edison Blue Amberol Records: Popular Series
List_of_Edison_Blue_Amberol_Records:_Popular_Series
Planetary system consisting of the Sun and objects orbiting it
system formed about 4.6 billion years ago when a dense region of a molecular cloud collapsed, creating the Sun and a protoplanetary disc from which the orbiting
Solar_System
Emission nebula in the constellation Orion
populations, which are separated by a molecular cloud. The eastern population is 0.2-0.5 Myr old and has a disk fraction of 45±7%. The western population is slightly
Flame_Nebula
Heat-trapping gas in an atmosphere
Earth's atmosphere, listed in decreasing order of average global mole fraction, are: water vapor, carbon dioxide, methane, nitrous oxide, ozone. Other
Greenhouse_gas
Map of most or all of the surface of the Earth
impossible because less than half of Earth's coastlines and only a small fraction of its continental interiors were known to any culture. With exploration
World_map
American multinational technology company
like Windows and has since expanded into areas such as Internet services, cloud computing, artificial intelligence, video gaming, and more. A Big Tech company
Microsoft
titles: Addition and Subtraction Work Together / How Decimals Work / How Fractions Work / How Numbers Work / Multiplication and Division Work Together The
List of Encyclopædia Britannica Films titles
List_of_Encyclopædia_Britannica_Films_titles
Seventh planet from the Sun
Methane molecules account for 2.3% of the atmosphere by molar fraction below the methane cloud deck at the pressure level of 1.3 bar (130 kPa); this represents
Uranus
Material composed of antiparticles
Antiparticles can also be generated at particle accelerators, but only a tiny fraction of these have successfully been bound together in experiments to form antiatoms
Antimatter
Light from the stars
multiple clouds. For these mechanisms the maximum expected CP fraction is q ∼ p 2 {\displaystyle q\sim p^{2}} , where p {\displaystyle p} is the fraction of
Starlight
Computational geometry concept
fraction (or number) of points in any closed halfspace that contains x. Tukey's depth measures how extreme a point is with respect to a point cloud.
Tukey_depth
Scenario of giant planet migration
results in a number of other differences with the original Nice model. The fraction of lunar impactors from the core of the asteroid belt during the Late Heavy
Jumping-Jupiter_scenario
Life science laboratory automation approach
factors must be assigned to progressively smaller fractions to increase the number of replicates. Cloud labs, on the other hand, do not fundamentally scale
Cloud_laboratory
Laser-cooled atoms in flight
repeated measurements to determine the resonant frequency. The fraction of the atoms in the cloud that have been driven from the initial state to final state
Atomic_fountain
Residual radioactive material following a nuclear blast
It is initially present in the radioactive cloud created by the explosion, and "falls out" of the cloud as it is moved by the atmosphere in the minutes
Nuclear_fallout
Natural object in space that releases gas
very small fraction of the total potential comet population, as the reservoir of comet-like bodies in the outer Solar System (in the Oort cloud) is about
Comet
2026 American company IPO
by Google, that xAI's annualized revenue of roughly $500 million was a fraction of Anthropic's $30 billion and OpenAI's $25 billion in the enterprise market
Initial public offering of SpaceX
Initial_public_offering_of_SpaceX
Sixth planet from the Sun
series of cloud features found in northern latitudes, nicknamed the "String of Pearls". These features are cloud clearings that reside in deeper cloud layers
Saturn
Hypothetical megastructure around a star
generated from the home planet's resources alone. Because only a tiny fraction of a star's energy emissions reaches the surface of any orbiting planet
Dyson_sphere
associated with thunderstorms, but unlike lightning flashes, which last only a fraction of a second, ball lightning reportedly lasts many seconds. Ball lightning
List_of_lightning_phenomena
Pressure exerted by a vapor in thermodynamic equilibrium
x_{i}} is the mole fraction of component i {\displaystyle i} in the liquid phase and y i {\displaystyle y_{i}} is the mole fraction of component i {\displaystyle
Vapor_pressure
American rapper
record producer, and actor. He is regarded as one of the originators of cloud rap. Viper began releasing music in 2003, originally under the name Lee
Viper_(rapper)
Human-caused changes to climate on Earth
Sulfate aerosols act as cloud condensation nuclei and lead to clouds that have more and smaller cloud droplets. These clouds reflect solar radiation more
Climate_change
High-energy particle, mainly originating outside the Solar System
Telescope (2013) have been interpreted as evidence that a significant fraction of primary cosmic rays originate from the supernova explosions of stars
Cosmic_ray
Topics referred to by the same term
OSF may refer to: Open Science Framework, a cloud-based management for open access science Open Semantic Framework, an integrated software stack using
OSF
French artificial intelligence company
"OpenAI's French rival Mistral AI is now worth $6 billion. That's still a fraction of its top competitors". Quartz (publication). Retrieved 13 June 2024.
Mistral_AI
Natural aerosol deriving from sea spray
a sea salt particle can serve as a very efficient cloud condensation nuclei (CCN), altering cloud reflectivity lifetime, and precipitation process. According
Sea_salt_aerosol
Spacecraft instrument
and dynamics of different geophysical phenomena, including: aerosol and cloud properties, sea, land and ice surface temperatures, ice motion, fires, and
Visible Infrared Imaging Radiometer Suite
Visible_Infrared_Imaging_Radiometer_Suite
Number, approximately 3.14
that it cannot be expressed exactly as a ratio of two integers, although fractions such as 22/7 are commonly used to approximate it. Consequently, its
Pi
Collection of character sketches
House is not a balance to weigh scruples and reasons to the turn of a fraction. ... Sir James, in detailing the inexhaustible stores of his memory and
The_Spirit_of_the_Age
Canadian astronomer
observed FQ = the fraction of stars that are quiet FHZ = the fraction of stars with rocky planets in the habitable zone FO = the fraction of stars with observable
Sara_Seager
Astronomical objects colder than red dwarfs
binaries than M-dwarfs. Systems with an L-dwarf as a primary have a binary fraction of 24+6 −2% with a typical separation of 5–8 astronomical units (AU). There
L_dwarf
Heterogeneous class of stars with unusual spectra
set of WR stars across all the local group galaxies. As a result, the fraction of WR stars produced through the binary channel, and therefore the number
Wolf–Rayet_star
Function describing an electron in an atom
ambiguous—either exactly 0 or exactly 1—not an intermediate or average value like the fraction 1/2. A superposition of eigenstates (2, 1, 1) and (3, 2, 1) would have
Atomic_orbital
Dust floating in space
The density of the dust cloud through which the Earth is traveling is approximately 10−6 dust grains/m3. A major fraction of the dust in space is "stardust"
Cosmic_dust
Machine learning technique
hidden representations and train interventions that manipulate a small fraction of model representations to steer model behaviors towards solving downstream
Fine-tuning_(deep_learning)
Proposed form of climate engineering
uncertainties associated with not only ice nucleation processes in cirrus clouds and the fraction of nucleation that occurs via heterogeneous and homogeneous freezing
Cirrus_cloud_thinning
Fraction of charged particles in a gas or an aqueous solution
M.; Terzieva, R.; Herbst, Eric (20 May 1998). "The Ionization Fraction in Dense Cloud Cores". The Astrophysical Journal. 499 (1): 234–249. Bibcode:1998ApJ
Degree_of_ionization
Interstellar comet in 2025
an active comet consisting of a solid icy nucleus and a coma, which is a cloud of gas and icy dust escaping from the nucleus. The Sun is responsible for
3I/ATLAS
Star forming region in the constellation Chamaleon
Chamaeleon Cloud (also known as Chamaeleon Complex) is a large star forming region (SFR) at the surface of the Local Bubble that includes the Chamaeleon
Chamaeleon_Cloud
Volcanic eruption in Italy
one of the deadliest eruptions in history. Vesuvius violently ejected a cloud of super-heated tephra and gases to a height of 33 km (21 mi), ejecting
Eruption of Mount Vesuvius in 79 AD
Eruption_of_Mount_Vesuvius_in_79_AD
Aspect of consciousness research
consists of "concatenated identifiable brief packets" in the time range of fractions of seconds (70 to 125 milliseconds during rest, 286 to 354 milliseconds
Models_of_consciousness
Natural material created during volcanic eruptions
pulverised products of pumice (vitric shards), individual phenocrysts (crystal fraction) and some lithic fragments (xenoliths). Ash generated during phreatic eruptions
Volcanic_ash
Void between celestial bodies
gastrointestinal tract. On a round-trip Mars mission lasting three years, a large fraction of the cells in an astronaut's body would be traversed and potentially
Outer_space
Capital of France
the International Bureau of Weights and Measures (in neighbouring Saint-Cloud), the International Energy Agency, the Organisation internationale de la
Paris
Default wallpaper of Windows XP
It is a photograph of green rolling hills and daytime sky with cirrus clouds. Charles O'Rear, a former National Geographic photographer, took the photo
Bliss_(photograph)
Native American educator and Presbyterian minister
that only a minute fraction of the Indian population was college bound. Shortly after, in the late 1920s Meriam Report, Roe Cloud voiced outrage at the
Henry_Roe_Cloud
Astrophysical phenomenon
inside a small dense cloud of circumstellar material, it will produce a shock wave that can efficiently convert a high fraction of the kinetic energy
Supernova
1986 nuclear accident in the Soviet Union
occurred within the affected populations (15 of them fatal), "a large fraction" being attributed to the accident. Long-term death estimates range from
Chernobyl_disaster
Ejecta from the Sun's corona
often 6–12 months after sunspot number reaches its maximum. Only a small fraction of CMEs are directed toward, and reach, the Earth. A CME arriving at Earth
Coronal_mass_ejection
2024 operating system version
Malayalam Chillu Letters (U+0D54-U+0D56) (9.0) Malayalam Fractions (U+0D58-U+0D5E) (9.0) Malayalam Fractions (U+0D76-U+0D78) (9.0) Sinhala Sign Candrabindu (U+0D81)
MacOS_Sequoia
compared with data from the 1970s, scientists discovered that the stratus cloud cover has decreased between 25% and 50%. In contrast with the sunny summer
Geography of southern California
Geography_of_southern_California
1940 self-portrait by Frida Kahlo
Kahlo. It shows Kahlo asleep in a wooden bed that appears to float among clouds, wrapped in vines and leaves, while a papier-mâché skeleton wired with sticks
The_Dream_(The_Bed)
"the commander-in-chief cannot remove from a place under his orders any fraction of the defense garrison determined by the Minister." The decree of August
French artillery during World War I
French_artillery_during_World_War_I
CLOUD FRACTION
CLOUD FRACTION
Boy/Male
Tamil
Cloud
Girl/Female
Tamil
Cloud
Boy/Male
Hindu, Indian, Sanskrit
Cloud; Rainy Clouds
Boy/Male
Arabic, Hindu, Indian, Muslim, Sindhi
Cloud that Carries Rain; Prophet Name; Rain Clouds
Girl/Female
Tamil
Cloud
Surname or Lastname
English
English : nickname for a noisy person, from Middle English lude ‘loud’ (Old English hlūd), perhaps in part preserving the Old English byname Hlūda that Ekwall postulates to explain the place names Loudham (Suffolk) and Lowdham (Nottinghamshire).English : topographic name for someone who lived by a roaring stream, Old English hlūde or hl̄de literally ‘the loud one’, or a habitational name from any of the places named from hl̄de, for example Lyde in Herefordshire and Somerset.English : variant of Louth.
Boy/Male
Tamil
Cloud
Boy/Male
Welsh
Lame.
Boy/Male
Tamil
Cloud
Surname or Lastname
English
English : topographic name for someone who lived near an outcrop or hill, from Old English clÅ«d ‘rock’ (only later used to denote vapor formations in the sky).French : from the Germanic personal name Hlodald, composed of the elements hlÅd ‘famous’, ‘clear’ + wald ‘rule’, which was borne by a saint and bishop of the 6th century.
Girl/Female
Tamil
Ambudhara | à®…à®®à¯à®ªà¯à®¤à®¾à®°à®¾
Cloud
Ambudhara | à®…à®®à¯à®ªà¯à®¤à®¾à®°à®¾
Boy/Male
American, Australian, British, Christian, Dutch, English, French, German, Indian, Latin
Lame
Girl/Female
Tamil
Cloud
Male
English
English form of French Claude, CLAUD means "lame."
Boy/Male
Tamil
Cloud
Girl/Female
Tamil
Cloud
Boy/Male
Tamil
Cloud
Boy/Male
Tamil
Cloud
Girl/Female
Tamil
Cloud
Girl/Female
Tamil
Cloud
CLOUD FRACTION
CLOUD FRACTION
Surname or Lastname
English
English : habitational name from Tilton in Leicestershire, named with the Old English personal name Tila + Old English tūn ‘farmstead’, ‘settlement’.William Tilton came to Lynn, MA, in or before 1637. Many of his descendants were master mariners, living on Martha’s Vineyard. James Tilton of DE (1745–1822) was a physician who became U.S. surgeon general.
Boy/Male
American, Australian, Bengali, Biblical, British, Chinese, Christian, Czechoslovakian, Danish, Dutch, English, Finnish, French, German, Greek, Hebrew, Indian, Irish, Jamaican, Latin, Lebanese, Netherlands, Portuguese, Shakespearean, Slovenia, Swedish, Swi
Rock; Stone; River; Strong
Girl/Female
Hindu
Light
Girl/Female
Latin American English French
Happy. Feminine of Felix.
Male
Scandinavian
 Scandinavian form of Greek Christophoros, KRISTOFFER means "Christ-bearer." Compare with another form of Kristoffer.
Girl/Female
Hindu
Pleasing, Loved
Boy/Male
Indian
Long-lived
Girl/Female
English
Modern blend of Ava and Ana.
Boy/Male
Hindu
Sarvaniki endrudu
Boy/Male
Tamil
Prabhanjan | பà¯à®°à®ªà®‚ஜந
Dust storm
CLOUD FRACTION
CLOUD FRACTION
CLOUD FRACTION
CLOUD FRACTION
CLOUD FRACTION
v. t.
To envelop in clouds; to cloud.
v. i.
To grow cloudy; to become obscure with clouds; -- often used with up.
n.
Cloud-gatherer; -- an epithet applied to Zeus.
n.
To cover with cloth, leather, or other material; to bandage; patch, or mend, with a clout.
v. t.
To mark with, or darken in, veins or sports; to variegate with colors; as, to cloud yarn.
n.
A rain cloud; one of the four principal varieties of clouds. See Cloud.
v. t.
To overspread or hide with a cloud or clouds; as, the sky is clouded.
n.
Consisting of a cloud or clouds.
a.
Having clouds resting on the top or head; reaching to the clouds; as, cloud-capped mountains.
superl.
Having, making, or being a strong or great sound; noisy; striking the ear with great force; as, a loud cry; loud thunder.
n.
Overcast or obscured with clouds; clouded; as, a cloudy sky.
a.
Built of, or in, the clouds; airy; unsubstantial; imaginary.
adv.
With a loud voice, or great noise; loudly; audibly.
superl.
Ostentatious; likely to attract attention; gaudy; as, a loud style of dress; loud colors.
a.
Under the clouds; attended or partly covered or obscured by clouds; somewhat cloudy.
n.
A dark vein or spot on a lighter material, as in marble; hence, a blemish or defect; as, a cloud upon one's reputation; a cloud on a title.
superl.
Emphatic; impressive; urgent; as, a loud call for united effort.
n.
That which has a dark, lowering, or threatening aspect; that which temporarily overshadows, obscures, or depresses; as, a cloud of sorrow; a cloud of war; a cloud upon the intellect.
v. t.
To darken or obscure, as if by hiding or enveloping with a cloud; hence, to render gloomy or sullen.
n.
A sudden copious rainfall, as the whole cloud had been precipitated at once.