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1the part around the neck of a shirt, jacket, or coat that usually folds down a coat with a fur collar I turned up my collar against the wind (= to keep warm). see blue-collar, dog collar, white-collar, wing collar
- 2a band of leather or strong cloth put around the neck of an animal, especially a dog a collar and leash see choke collar
- 3(technology) a band made of a strong material that is put around something, such as a pipe or a piece of machinery, to make it stronger or to join two parts together Idioms
angry or embarrassed He got very hot under the collar when I asked him where he'd been all day.
Check pronunciation: collar