Meaning of knocker

knock•er

Pronunciation: (nok'ur), [key]
— n.
  1. a person or thing that knocks.
  2. a hinged knob, bar, etc., on a door, for use in knocking.
  3. a persistent and carping critic; faultfinder.
  4. . a female breast.
  5. canvassing or selling door-to-door.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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