Idioms: get wind of

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Idioms: 

get wind of

Learn of; hear a rumor about. For example, 

"If my old aunt gets wind of it, she'll cut me off with a shilling" (William Makepeace Thackeray, in Paris Sketch Book, 1840). This expression alludes to an animal perceiving a scent carried by the wind. [First half of 1800s]