countersunk Meaning, Definition & Usage

  1. verb insert (a nail or screw below the surface, as into a countersink)
    set; countersink.

WordNet

Coun"ter*sunk` p. p. & a. from Countersink
Definitions
  1. Chamfered at the top; -- said of a hole.
  2. Sunk into a chamfer; as, a countersunk bolt.
  3. Beveled on the lower side, so as to fit a chamfered countersink; as, a countersunk nailhead.

Webster 1913