D defs.my
Entry 3 senses Webster, 1913

Rapper

/(răp"pẽr)/ · Rap·per · IPA /ˈɹæpɚ/
01 n. One who, or that which, raps or knocks; specifically, the knocker of a door.
  1. 1.
    One who, or that which, raps or knocks; specifically, the knocker of a door.
  2. 2.
    A forcible oath or lie.[Slang]
  3. 3.
    A musician specializing in rap music. See: rap music