cloud

1. Any collection of particles (e.g., smoke or dust) or gases that is visible (synset 111459786)
   is a type of: physical phenomenon - a natural phenomenon involving the physical properties of matter and energy
   subtypes:

   • coma - (astronomy) the luminous cloud of particles surrounding the frozen nucleus of a comet; forms as the comet approaches the sun and is warmed
   • nebula - an immense cloud of gas (mainly hydrogen) and dust in interstellar space
   • aerosol - a cloud of solid or liquid particles in a gas
   • cosmic dust - clouds of particles or gases occurring throughout interstellar space
   • dust cloud - a cloud of dust suspended in the air
   • mushroom, mushroom cloud, mushroom-shaped cloud - a large cloud of rubble and dust shaped like a mushroom and rising into the sky after an explosion (especially of a nuclear bomb)
2. A visible mass of water or ice particles suspended at a considerable altitude (synset 109270316)
   is a type of: atmospheric phenomenon - a physical phenomenon associated with the atmosphere
   subtypes:

   • cirrocumulus, cirrocumulus cloud - a cloud at a high altitude consisting of a series of regularly arranged small clouds resembling ripples
   • cirrostratus, cirrostratus cloud - a thin uniform layer of hazy cloud at high altitude
   • cirrus, cirrus cloud - a wispy white cloud (usually of fine ice crystals) at a high altitude (4 to 8 miles)
   • cloud bank - a layer of clouds seen from a distance
   • condensation trail, contrail - an artificial cloud created by an aircraft; caused either by condensation due to the reduction in air pressure above the wing surface or by water vapor in the engine exhaust
   • cumulonimbus, cumulonimbus cloud, thundercloud - a dark cloud of great vertical extent charged with electricity; associated with thunderstorms
   • cumulus, cumulus cloud - a globular cloud
   • mother-of-pearl cloud, nacreous cloud - a luminous iridescent cloud at a high altitude that may be seen when the sun is a few degrees below the horizon
   • nebule - a small cloud
   • nimbus, nimbus cloud, rain cloud - a dark grey cloud bearing rain
   • storm cloud - a heavy dark cloud presaging rain or a storm
   • stratus, stratus cloud - a large dark low cloud
   is a part of: sky - the atmosphere and outer space as viewed from the earth
   substance holonym: water vapor, water vapour - water in a vaporous form diffused in the atmosphere but below boiling temperature
3. Out of touch with reality (synset 113983643)
   "his head was in the clouds"
   is a type of: irreality, unreality - the state of being insubstantial or imaginary; not existing objectively or in fact
4. A cause of worry or gloom or trouble (synset 114548710)
   "the only cloud on the horizon was the possibility of dissent by the French"
   is a type of: gloom, gloominess, glumness - an atmosphere of depression and melancholy
5. Suspicion affecting your reputation (synset 114006484)
   "after that mistake he was under a cloud"
   is a type of: suspicion - the state of being suspected
6. A group of many things in the air or on the ground (synset 108012591)
   "a swarm of insects obscured the light"; "clouds of blossoms"; "it discharged a cloud of spores"
   is a type of: group, grouping - any number of entities (members) considered as a unit
   subtypes: infestation, plague - a swarm of insects that attack plants
   member holonym: insect - small air-breathing arthropod
   same as: swarm

1. Make overcast or cloudy (synset 202776675)
   "Fall weather often overcasts our beaches"
   is a type of: darken - make dark or darker
   subtypes:

   • fog up - get foggy
   • haze - become hazy, dull, or cloudy
   same as: overcast
2. Make less visible or unclear (synset 202162161)
   "The stars are obscured by the clouds"; "the big elm tree obscures our view of the valley"
   is a type of: conceal, hide - prevent from being seen or discovered
   subtypes: overshadow - cast a shadow upon
   same as: becloud, befog, fog, haze over, mist, obnubilate, obscure
3. Billow up in the form of a cloud (synset 202045422)
   "The smoke clouded above the houses"
   is a type of: billow, wallow - rise up as if in waves
4. Make gloomy or depressed (synset 201773486)
   "Their faces were clouded with sadness"
   is a type of: affect, impress, move, strike - have an emotional or cognitive impact upon
5. Place under suspicion or cast doubt upon (synset 201540747)
   "sully someone's reputation"
   is a type of: deflower, impair, mar, spoil, vitiate - make imperfect
   same as: corrupt, defile, sully, taint
6. Make less clear (synset 200589133)
   "the stroke clouded memories of her youth"
   is a type of: alter, change, modify - cause to change; make different; cause a transformation
7. Colour with streaks or blotches of different shades (synset 200511445)
   is a type of: spot - mark with a spot or spots so as to allow easy recognition
   subtypes:

   • harlequin - variegate with spots or marks
   • speckle, stipple - produce a mottled effect
   same as: dapple, mottle
8. Make milky or dull (synset 200392535)
   "The chemical clouded the liquid to which it was added"
   is a type of: dull - make less lively or vigorous

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