|Origin:||clud 'rock, hill'; because some clouds look like rocks|
cloud1 S3 W3
a white or grey mass in the sky that forms from very small drops of water
in the sky[uncountable and countable]DN
heavy/thick/dense etc clouds
Dark clouds floated across the moon.
Heavy clouds had gathered over the summit of Mont Blanc.
low/high cloud➔ storm cloud, thundercloud
Visibility was bad due to low cloud.
a mass of dust, smoke etc in the air, or a large number of insects flying together
in the air[countable]
cloud of dust/smoke/gas etc
A cloud of steam rose into the air
clouds of mosquitoes buzzing around us
something that makes you feel afraid, worried. unhappy etc
the cloud of economic recession
cloud on the horizon (=something that might spoil a happy situation)
The only cloud on the horizon was her mother's illness.
Fears of renewed terrorist attacks cast a cloud over the event (=spoilt the happy situation).
He returned to New York under a cloud of gloom and despair.
if someone is under a cloud, people have a bad opinion of them because they think they have done something wrong:
He left the company under a cloud of suspicion.
to be very happy about something
used to say that there is something good even in a situation that seems very sad or difficult
7 British English
to think that a situation is much better than it really is, in a way that is slightly stupid