Definition of billow noun from the Oxford Advanced American Dictionary

 

billow

 noun
noun
NAmE//ˈbɪloʊ//
 
[usually plural]
 
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a moving mass or cloud of smoke, steam, etc. like a wave A farmer was burning straw, the yellow billows of smoke spiraling lazily upward.
See the Oxford Advanced Learner's Dictionary entry: billow

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