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English definition of “knocker”

knocker

noun [C] uk   /ˈnɒk.ər/ us    /ˈnɑː.kɚ/

knocker noun [C] (METAL OBJECT)

(also doorknocker) a metal object attached to a door that visitors use to hit the door in order to attract attentionDoors and parts of doors

knocker noun [C] (CRITIC)

UK informal disapproving a person who is always criticizing someone or somethingDisapproving and criticizingDamaging reputation

knocker noun [C] (BREASTS)

knockers [plural] slang a woman's breasts. Some people consider this offensive.The breast
(Definition of knocker from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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