cloud

noun1 of 2

a mass of water vapor in the sky, as when it is going to rain

• “The sky is blue with not a cloud in sight.”Tatoeba
• “The years passed by as fast as clouds in summer.”Tatoeba

Sentences from Tatoeba show real usage. A word can have several meanings, so a sentence may use another one.

verb2 of 2

To become foggy or gloomy, or obscured from sight.