D defs.my
Entry 2 senses Webster, 1913

Bounder

/(bound"ẽr)/ · Bound·er · IPA /bˈaʊndər/
01 n. One who, or that which, limits; a boundary.
  1. 1.
    One who, or that which, limits; a boundary.
  2. 2.
    One who behaves dishonorably or objectionably; a cad.