Found 2 items, similar to countersink.
English → English (WordNet) Definition: countersink 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 bit] v : insert (a nail or screw below the surface, as into a countersink) [syn: set] [also: countersunk, countersank]
English → English (gcide) Definition: Countersink Countersink \Coun"ter*sink`\ (koun"t[~e]r*s[i^][ng]k`; 277), v. t. [imp. & p. p. Countersunk (-s[u^][ng]k`); p. pr. & vb. n. Countersinking.] 1. To chamfer or form a depression around the top of (a hole in wood, metal, etc.) for the reception of the head of a screw or bolt below the surface, either wholly or in part; as, to countersink a hole for a screw. [1913 Webster] 2. To cause to sink even with or below the surface; as, to countersink a screw or bolt into woodwork. [1913 Webster] Countersink \Coun"ter*sink`\, n. 1. An enlargement of the upper part of a hole, forming a cavity or depression for receiving the head of a screw or bolt. [1913 Webster] Note: In the United States a flaring cavity formed by chamfering the edges of a round hole is called a countersink, while a cylindrical flat-bottomed enlargement of the mouth of the hole is usually called a conterbore. [1913 Webster] 2. A drill or cutting tool for countersinking holes. [1913 Webster]