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coun•ter•sink



Pronunciation: (
v., n.koun'tur-singk";
v. also koun"tur-singk'),
[key]
v., -sank, -sunk, -sink•ing,
n.


v.t.
1. to enlarge the upper part of (a cavity), esp. by chamfering, to receive the cone-shaped head of a screw, bolt, etc.
2. to cause (the head of a screw, bolt, etc.) to sink into a prepared depression so as to be flush with or below the surface.

n.
1. a tool for countersinking a hole.
2. a countersunk hole.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

countersignaturecounterspy
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