Cloud

v. make dim, obscure; darken, make gloomy; cover with clouds; become cloudy

n. white puffy collection of water in the sky; shade, shadow

A cloud is a visible mass of condensed droplets, frozen crystals suspended in the atmosphere above the surface of the Earth or another planetary body, such as a moon. (Clouds can also occur as masses of material in interstellar space, where they are called interstellar clouds and nebulae.) The branch of meteorology in which clouds are studied is nephology.
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Noun
1. any collection of particles (e.g., smoke or dust) or gases that is visible
(hypernym) physical phenomenon
(hyponym) coma
2. a visible mass of water or ice particles suspended at a considerable altitude
(hypernym) atmospheric phenomenon
(hyponym) cirrocumulus, cirrocumulus cloud
(part-holonym) sky
(substance-meronym) water vapor, water vapour
(derivation) overcast
3. out of touch with reality; "his head was in the clouds"
(hypernym) unreality, irreality
4. a cause of worry or gloom or trouble; "the only cloud on the horizon was the possibility of dissent by the French"
(hypernym) gloom, gloominess, glumness
5. suspicion affecting your reputation; "after that mistake he was under a cloud"
(hypernym) suspicion
(derivation) defile, sully, corrupt, taint
6. a group of many insects; "a swarm of insects obscured the light"; "a cloud of butterflies"
(synonym) swarm
(hypernym) animal group
(hyponym) infestation, plague
(member-meronym) insect
Verb
1. make overcast or cloudy; "Fall weather often overcasts our beaches"
(synonym) overcast
(hypernym) darken
(hyponym) fog up
(see-also) overcloud, cloud over, cloud up
2. make less visible or unclear; "The stars are obscured by the clouds"
(synonym) obscure, befog, becloud, obnubilate, haze over, fog, mist
(hypernym) hide, conceal
(hyponym) overshadow
3. billow up in the form of a cloud; "The smoke clouded above the houses"
(hypernym) billow, wallow
4. make gloomy or depressed; "Their faces were clouded with sadness"
(hypernym) affect, impress, move, strike
5. place under suspicion or cast doubt upon; "sully someone's reputation"
(synonym) defile, sully, corrupt, taint
(hypernym) mar, impair, spoil, deflower, vitiate
6. colour with streaks or blotches of different shades
(synonym) mottle, dapple
(hypernym) spot
(hyponym) harlequin
7. make milky or dull; "The chemical clouded the liquid to which it was added"
(hypernym) dull

(v. t.)
To overspread or hide with a cloud or clouds; as, the sky is clouded.
  

(v. t.)
To mark with, or darken in, veins or sports; to variegate with colors; as, to cloud yarn.
  

(v. t.)
To darken or obscure, as if by hiding or enveloping with a cloud; hence, to render gloomy or sullen.
  

(v. t.)
To blacken; to sully; to stain; to tarnish; to damage; -- esp. used of reputation or character.
  

(v. i.)
To grow cloudy; to become obscure with clouds; -- often used with up.
  

(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.
  

(n.)
A mass or volume of smoke, or flying dust, resembling vapor.
  

(n.)
A large, loosely-knitted scarf, worn by women about the head.
  

(n.)
A great crowd or multitude; a vast collection.
  

(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.
  

(n.)
A collection of visible vapor, or watery particles, suspended in the upper atmosphere.
  

one that draws water; poverty; cloud; death
  

a cloud; fountain; his eye
  

a cloud; prophecy; divination
  

a very great mass, or cloud
  

cloud
  

cloud; mass of darkness; fountain; eye