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English definition of “cloud”

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cloud

noun [C/U]  /klɑʊd/ us  
a white or gray mass of very small drops of water or ice that float in the sky: [C] Those dark clouds look like we’re going to get some rain. A cloud is also a mass of something, such as dust or smoke, that moves together: The distant cloud of dust in the valley announced the approach of a car. A cloud is also something which causes sadness or fear: [C] After the diagnosis of cancer, she lived under a cloud.

cloud

verb [T]  /klɑʊd/ us  
to fill with clouds or with something that looks like a cloud: [T] Smoke clouded the sky. If something clouds a situation or feeling, it makes it less clear: The fact that Jack was an old friend clouded her judgment.
Phrasal verbs
(Definition of cloud from the Cambridge Academic Content Dictionary © Cambridge University Press)
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