SG Heritage Dictionary

Word of the Day: Catachrestical

Countersunk [Imperfect tense and past participle] Webster's Dictionary 1913

Countersunk [Past participle and adjective] Webster's Dictionary 1913

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.