- (p.p.&a.) Chamfered at the top; -- said of a hole.
- (p.p.&a.) Beveled on the lower side, so as to fit a chamfered countersink; as, a countersunk nailhead.
- (p.p.&a.) Sunk into a chamfer; as, a countersunk bolt.
- (imp.&p.p.) of Countersink.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). countersunk. Retrieved September 22, 2026, from http://smartdefine.org/countersunk/definitions/1992292 |
| Chicago | Webster's. 2011. "countersunk" http://smartdefine.org/countersunk/definitions/1992292 (accessed September 22, 2026). |
| Harvard | Webster's 2011, countersunk, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/countersunk/definitions/1992292>. |
| MLA | Webster's. "countersunk" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/countersunk/definitions/1992292> |