(meteorology) A small cloud formation which is found attached to, or close by, a major cloud of one of the cloud genera, which is responsible for its development and continuance.

(poetic) Made cloudy; clouded.

The area of unlit sky between two rainbows, caused by the deviation angles of the primary and secondary rainbows.

(physics, meteorology) A fleecy cloud formation consisting of large whitish or greyish globular cloudlets with shaded portions, often grouped in flocks or rows. (Abbreviated Ac.)

(physics, meteorology) A principal medium-level cloud type in the form of a gray or bluish (never white) sheet or layer of striated, fibrous, or uniform appearance.

(meteorology) A horizontal-topped mass of cloud, shaped like a blacksmith's anvil, that forms before a thunderstorm.

A tall, distinctively anvil-shaped thundercloud.

(meteorology) A low, horizontal cloud typically forming at the leading edge of thunderstorm outflow

(meteorology) Ellipsis of undulatus asperatus cloud.

A cloud formation characterized by wavy undulations in the cloud base.

(painting) Translucent or hazy.

(meteorology) a small, triangular cloud, extending downwind from the peak of a mountain as if a flag, or banner.

One who or that which beclouds.

The process of becoming clouded or obscured.

Obscured with fog or smoke; murky.

Unclear, hazy, difficult to view.

(meteorology) A rapidly expanding disc-shaped region of luminosity, lasting less than a thousandth of a second, seen high above energetic lightning associated with hail-producing regions of thunderstorms, reaching up no higher than about 12 miles altitude.

(astronomy, meteorology) an upper atmospheric optical phenomenon associated with thunderstorms, rapidly expanding disk-shaped regions of luminosity, lasting less than a thousandth of a second, which occur high above energetic cloud-to-ground lightning of positive or negative polarity

Anything bent or curved, such as a rainbow.

(meteorology, of the sky) Five-eighths to seven-eighths obscured by clouds; incompletely covered by clouds.

(meteorology) An accessory cloud in the form of a cap which occurs above, or attached to, cumulus, cumulonimbus, and sometimes stratocumulus clouds.

(meteorology) A cloud species which shows vertical formations giving a crenellated appearance, associated with cirrus, cirrocumulus, altocumulus, and stratocumulus genera.

Clouded by cataracts.

(meteorology) The measurement of visible distance from ground or sea level to an overcast cloud cover; under a clear sky, the ceiling measurement is identified as "unlimited."

The nebulous part of a comet or star.

(physics, meteorology) A principal high-level cloud type appearing as a thin, white patch of cloud without shadows, composed of very small droplets in the form of grains or ripples. The elements may be merged or separate, and more or less regularly arranged; they subtend an angle of less than 1° when observed at an angle of more than 30° above the horizon. Holes or rifts often occur in a sheet of cirrocumulus. Abbreviated Cc.

A thin, amorphous cirrus cloud

Relating to, or characteristic of cirrostratus clouds

Alternative form of cirrostrative [Relating to, or characteristic of cirrostratus clouds]

(meteorology) A principal high-level cloud type appearing as a whitish veil, usually fibrous but sometimes smooth, which may totally cover the sky and which often produces halo phenomena. Abbreviated Cs

Pertaining to cirrus clouds.

a continuous covering of cirrostratus cloud

(meteorology) A principal high-level cloud type characterised by white, delicate filaments or wisps, of white (or mostly white) patches, or of narrow bands, found at an altitude of above 7000 metres.

(obsolete) A rock; boulder; a hill.

Alternative form of cloud nine [(idiomatic) Often in the phrase on cloud nine: a state of bliss, elation or happiness.]

A wall of clouds, rising above horizon or observed from a distance, but not overhead.

The altitude of the base of a mass of cloud; measured by a ceilometer.

(meteorology) A fogbow seen in clouds, typically from an aircraft looking downwards.

Alternative form of cloudburst [A sudden heavy rainstorm.]

(meteorology) Synonym of fallstreak hole

The location above the surface of the Earth where the lowest layer of clouds are reported as broken, overcast or obscuration (as opposed to thin or partial).

(slang) The practice of blowing large clouds of vapor using electronic cigarettes.

(meteorology) The percentage or fraction of the sky obscured by clouds.

The upper surface of a cloud

A generally tropical or subtropical, evergreen, montane, moist forest characterized by a persistent, frequent or seasonal low-level cloud cover, usually at the canopy level.

(meteorology) Grouping of the standard cloud classification system. Members include cirrus, cirrocumulus, cirrostratus, altocumulus, altostratus, nimbostratus, stratocumulus, stratus, cumulus, and cumulonimbus.

Synonym of cloud nine.

(intransitive) To become cloudy or overcast.

A subgrouping of standard cloud classification system, coming after the major cloud genera

(meteorology) long rolls of counter-rotating air that are oriented approximately parallel to the ground in the planetary boundary layer.

To become cloudy

unsubstantial or imaginary.

(poetic, archaic) Capped with clouds

Based predominantly on cloud computing.

Full of clouds.

Alternative spelling of cloud seeding [The act of firing munitions containing silver iodide at passing clouds to make them more likely to produce rain.]

Mass of clouds; cloudiness.

Alternative form of cloud bank [A wall of clouds, rising above horizon or observed from a distance, but not overhead.]

Alternative form of cloud base [The altitude of the base of a mass of cloud; measured by a ceilometer.]

The use of a cloudbuster.

(poetic, archaic) Capped with clouds.

Alternative form of cloud cover [(meteorology) The percentage or fraction of the sky obscured by clouds.]

In a clouded way.

(transitive, intransitive, sometimes figuratively) To make or become cloudy or clouded.

A mass of clouds, or anything resembling clouds.

Alternative form of cloud forest [A generally tropical or subtropical, evergreen, montane, moist forest characterized by a persistent, frequent or seasonal low-level cloud cover, usually at the canopy level.]

The type or shape of a cloud.

Abounding with clouds, clouded, cloudy.

(of weather) Somewhat cloudy.

A little cloud.

The line formed by the surface of clouds.

(nonstandard) Of or pertaining to a cloud or clouds; cloudlike; cloudy; nebulous.

One who engages in cloudspotting.

The observation of clouds as a recreational activity.

The topmost layer of cloud.

Swept by or enshrouded in clouds.

In the form of a cloud.

Covered with or characterised by clouds; overcast.

Obsolete form of cloud. [(intransitive) To become foggy or gloomy, or obscured from sight.]

cloud point

(meteorology) a standing cloud, extending downwind from a mountain range, or ridge.

(hanggliding) A cumulus, a fluffy type of cloud.

Having the shape of a cumulus cloud.

Alternative form of cumulonimbus [(meteorology) A cloud, with a tall structure and a flat base, that is often associated with thunderstorms.]

(aviation, slang) Solid terrain, such as mountains, obscured by clouds and thus posing a risk to the pilot of an aircraft.

(meteorology) A cloud, with a tall structure and a flat base, that is often associated with thunderstorms.

A pyrocumulonimbus cloud.

Synonym of funnel cloud

Synonym of stratocumulus

Alternative form of cumulus

A large white puffy cloud that develops through convection. On a hot, humid day, they can form towers and even become cumulonimbus clouds.

Resembling dawn or some aspect of it.

(archaic) To clear of clouds.

(meteorology) A (part of a) virga; a streak of falling ice crystals that sublimate before reaching the ground.

(meteorology) A large gap, usually circular or elliptical, that can appear in cirrocumulus or altocumulus clouds as a result of the Wegener-Bergeron-Findeisen process.

Covered by (or as if by) a film; hazy

A dense cumuliform cloud associated with fire or volcanic eruptions.

(meteorology) A cloud species which consists of rounded tufts of cloud, often formed by dissipation from larger cloud species. Associated with cirrus, cirrocumulus, altocumulus, and stratocumulus genera.

(meteorology) A white arc or circle, similar to a rainbow, which can appear in the sky in foggy conditions as sunlight passes through small airborne water droplets.

Obscured by mist or fog; unclear; hazy

(meteorology) A cloud species which consists of broken shreds of cloud; scud.

A very thin cloud resembling a veil, especially one formed of water droplets from a rising plume (from a cooling tower etc)

(meteorology) A tapering cloud descending from a larger storm cloud, indicating the presence of an intense vortex. A tornado is a funnel cloud which reaches the ground.

(figuratively) light; giving the effect of haze

A little globule.

Affected by haze; hazy.

Thick or obscured with haze.

A shimmering atmospheric disturbance caused by currents of warm air between the observer and the object observed.

A heat haze.

(meteorology) The amount of water which would cover a surface to the depth of an inch, used as a measurement of rainfall.

(meteorology) an accessory cloud, in the shape of an anvil which forms by spreading at the top of a cumulonimbus.

(zoology) Having a cloudy appearance.

Clouded with brown.

(obsolete, rare) Cloudless.

(transitive) To shut within clouds.

(meteorology) polar stratospheric cloud

(meteorology) A high-altitude cloud that is shaped like a lens.

(meteorology) a cloud species which consists of rounded lens shaped of cloud, often forming near mountains. Associated with cirrocumulus, and altocumulus, and sometimes stratocumulus genera.

A sky filled with a regular pattern of altocumulus clouds somewhat resembling the skin of a mackerel.

(meteorology) An accessory cloud like a mammary in appearance, which can form on the underside of most cloud genera.

Ellipsis of mammatus cloud. [(meteorology) A cellular pattern of pouches hanging underneath the base of a cloud.]

(meteorology) A cellular pattern of pouches hanging underneath the base of a cloud.

A long streaky cloud, spreading out like a horse's tail, and believed to indicate rain; a cirrus cloud.

A cirrus cloud formation resembling horse tails.

Beams of the northern lights when they rise and fall alternately without any considerable change of length.

A region at middle altitude that is regularly misty, as opposed to the areas above and below.

Clouded with, or as with, mist.

(meteorology) A rainbow formed by moonlight diffracted by water droplets in the air, usually fainter than a daytime rainbow and with fewer distinguishable colours.

A rolling cloud in the shape of a cylinder.

Hard to see through, as a fog or mist.

A large cloud of smoke, flame and debris that rises into the sky as a result of a large explosion, especially after a nuclear explosion, characterized by a long shaft rising from the ground into a much-larger or more-spread-out top, reminiscent of a mushroom in shape.

polar stratospheric cloud

Cloudy; diffuse.

(transitive) To convert into a cloudy or diffuse form.

Clouded with indistinct colour markings.

A clouded or ill-defined mark of colour.

(obsolete) A little cloud.

nebulous; cloudy

(meteorology, astronomy) The characteristic of being nebulous; cloudiness (measured in octas).

(meteorology) a cloud species which consists of a veil of cloud, showing no distinct details. Associated with cirrostratus, and stratus genera.

As if viewed through a cloud or haze.

(heraldry) Alternative form of nebuly [(heraldry) Edged in a deeply wavy line, intended to represent clouds.]

The act of seeking and finding shapes in clouds.

The classification of clouds.

A picture of a cloud.

(obsolete) A miasma, or noxious atmosphere.

Having a nimb or halo.

(rare) Serving to bring clouds or stormy weather.

(rare) A cumulonimbus cloud.

(meteorology) According to the World Meteorological Organization, a mid-level, principal cloud type, generally formless and dark grey in colour, which forms from altostratus occurring in layers at the middle altitude of the troposphere (usually above 2400 metres). Nimbostratus usually brings precipitation as the mid-level clouds thicken and subside into the low level of the troposphere. Frontal or cyclonic lift can also carry the top of a deep nimbostratus layer into the high levels of the troposphere. Also classified or characterized as multi-level; abbreviated Ns.

A gray rain cloud.

(countable) A nodular protrusion.

(medicine) A cloudy object or appearance in urine.

Bringing, or producing, clouds; cloudy.

Born of, or produced from, clouds.

obnubilation; a clouding over

Alternative form of nubilous [Cloudy, misty.]

Cloudy, misty.

(rare) Wandering in the clouds; moving through the air.

(rare, literally) A veiling with or concealment in clouds.

(obsolete, rare) Overclouded, cloudy.

(meteorology) One eighth of the total area of the celestial dome; used as a measure of cloudiness (one okta means that one eighth of the sky is obscured, two oktas that one quarter is obscured, and so on).

(poetic) opalescent; misty or milky in appearance

(meteorology, aviation) overcast

A cloud covering all of the sky from horizon to horizon; cloudy.

Of the sky, covered with cloud; overcast.

(obsolete, meteorology) A sheet of cloud covering the whole sky, especially nimbostratus.

(obsolete, medicine) A pannus.

(meteorology) A type of accessory cloud, looking like shreds either attached to, or separated from, the main cloud formation; mainly associated with nimbostratus, cumulus, and cumulonimbus.

(meteorology) A small thin cloud attached to a cumulus cloud.

(astronomy, meteorology) An upper-atmospheric optical phenomenon associated with thunderstorms, a short-lasting pinpoint of light on the surface of convective domes that produces a gnome.

(of a climate) Subject to seasonal rainfall

(meteorology) A relatively rare type of clouds that occurs high in the stratosphere; polar stratospheric clouds often resemble mother-of-pearl as they shine in vivid colours, known as irisation

An extreme manifestation of a pyrocumulus, generated by the heat of a wildfire, that often rises to the upper troposphere or lower stratosphere.

(volcanology, meteorology) A dense cloud associated with fire or volcanic activity.

Thin, flying, broken clouds, or any portion of floating vapour in the sky.

A dark band in the yellow portion of the solar spectrum near the sodium line, caused by the presence of water vapour in the atmosphere, and hence sometimes used in weather predictions.

A cloud shape added to a technical drawing to highlight a region that has been modified since the previous version of the drawing.

(meteorology) A low, horizontal, tube-shaped, and relatively rare type of arcus cloud, differing from shelf clouds by being completely detached from other cloud features.

(meteorology) A form of stratocumulus with parallel lines of dense cloud.

(meteorology, of clouds) Covering three eighths to four eighths of the sky.

(obsolete) A hard swelling of a gland or other organ.

(meteorology) A low, horizontal cloud typically forming at the leading edge of thunderstorm outflow. An arcus type cloud often found along squall lines.

The close of the day before nightfall, when fog comes.

(meteorology) A cloud species which consists of dense, high level strands, which can haze, or block the sun. Associated only with cirrus formations.

A cumulus cloud.

(meteorology) a small cloud that remains stationary and is related to a geographical feature, such as a mountain. Classified as banner clouds, cap clouds, crest clouds, or lenticular clouds http://amsglossary.allenpress.com

A large rain cloud, with potential to bring a storm.

A dark and ominous cloud that appears to indicate a coming storm.

(meteorology) Descriptive of clouds with extensive horizontal development

An altostratus cloud.

(meteorology, of clouds) Resembling cumulus but with extensive horizontal development.

(meteorology) A principal low-level cloud type, predominantly stratiform, in the form of a gray and/or whitish layer or patch, which nearly always has dark parts and is nonfibrous.

(meteorology) A principal, low-level cloud type in the form of a gray layer with a rather uniform base, usually not associated with precipitation, and capable of producing corona phenomena and a weak, uniform luminance; abbreviated St.

(meteorology) Stratus clouds which are scattered or ragged.

(meteorology) An atmospheric object smaller than a cloud

(nonce word, obsolete, poetic) Under the clouds; partly covered or obscured by cloud.

Alternative spelling of thundercloud [A large, dark cloud, usually a cumulonimbus, charged with electricity and producing thunder and lightning; a stormcloud]

(by extension, figuratively) Something menacing and brooding.

The top portion of a cumulonimbus cloud, which tends to be flattened or fibery in appearance, and may be indicative of thunderstorm activity.

Characterised by thunderstorms.

Of weather: stormy, with thunder and lightning.

Smoky or misty.

(meteorology) Stratocumulus.

(meteorology) A cloud species which consists of fine hair-like strands, with hooked terminations. Associated only with cirrus formations.

(meteorology) An unbroken or nearly unbroken cloud layer below the point of observation.

(meteorology) Ellipsis of undulatus asperatus cloud.

(transitive, optometry) To adjust the lenses a patient looks through in order to clarify their vision.

(meteorology) an accessory cloud resembling a veil extending over a large distance; normally associated with cumulus and cumulonimbus

(meteorology, countable) A streak of rain or snow that is dissipated in falling and does not reach the ground, commonly appearing descending from a cloud layer.

(botany, archaic) volubile; winding

(meteorology) A localized, persistent, often abrupt lowering from a rain-free base of a thunderstorm.

A transient condensation cloud surrounding large explosions in humid air.

(meteorology) Of a cloud ceiling, limiting vision to 50 feet (15 meters) or less.

(aviation) Pertaining to weather conditions of zero ceiling and zero visibility (i.e., opaque cloud all the way down to ground level), or to aircraft operations in such conditions.

(meteorology) one of the distinctive forms that a cloud takes relating to the altitude of its base, either "low", "middle", or "high", and designated by the respective prefixes strato-, alto-, and cirro-.