cloud

A cloud is a visible mass of small water droplets or ice particles which are suspended in the sky. (noun)

An example of a cloud is what makes the sky dark on a rainy day.

A cloud is a mass of smoke, dust, steam or a mass of things suspended in the air. (noun)

To cloud means to darken, cover or make gloomy. (verb)

An example of to cloud is fog covering a view of the landscape.

See cloud in Webster's New World College Dictionary

noun

a visible mass of tiny, condensed water droplets or ice crystals suspended in the atmosphere: clouds are commonly classified in four groups: A (high clouds above 6,096 m or 20,000 ft) cirrus, cirrostratus, cirrocumulus; B (intermediate clouds, 1,981 m to 6,096 m or 6,500 to 20,000 ft) altostratus, altocumulus; C (low clouds, below 1,981 m or 6,500 ft) stratus, stratocumulus, nimbostratus; D (clouds of great vertical continuity) cumulus, cumulonimbus
a mass of smoke, dust, steam, etc.
a great number of things close together and in motion: a cloud of locusts
an appearance of murkiness or dimness, as in a liquid
a dark marking, as in marble
anything that darkens, obscures, threatens, or makes gloomy

transitive verb

intransitive verb

See cloud in American Heritage Dictionary 4

(kloud)

noun

a. A visible body of very fine water droplets or ice particles suspended in the atmosphere at altitudes ranging up to several miles above sea level.
b. A mass, as of dust, smoke, or steam, suspended in the atmosphere or in outer space.
A large moving body of things in the air or on the ground; a swarm: a cloud of locusts.
Something that darkens or fills with gloom.
A dark region or blemish, as on a polished stone.
Something that obscures.
Suspicion or a charge affecting a reputation.
A collection of charged particles: an electron cloud.