Countersink - Definition
countersink
n 1: a hole (usually in wood) with the top part enlarged so that
a screw or bolt will fit into it and lie below the surface
2: a bit for enlarging the upper part of a hole [syn:
counterbore, countersink, countersink bit]
v 1: insert (a nail or screw below the surface, as into a
countersink) [syn: set, countersink]