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Adjacent Words

Counterseal
Countersealed
Countersealing
Countersecure
Countersense
countershading
countershaft
countershot
Countersign
Countersignal
countersignature
Countersigned
Countersigning
countersink bit
Countersinking
counterspy
counterstain
Counterstand
counterstatement
Counterstatute
Counterstep
Counterstock
counterstrike
Counterstroke
countersubversion
countersuit

countersink definitions

WordNet (r) 3.0 (2005)

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]

Merriam Webster's

I. transitive verb (countersunk; -sinking) Date: 1816 1. to make a countersink on (a hole) 2. to set the head of (as a screw) at or below the surface II. noun Date: 1816 1. a bit or drill for making a funnel-shaped enlargement at the outer end of a drilled hole 2. the enlargement made by a countersink

Oxford Reference Dictionary

v.tr. (past and past part. -sunk) 1 enlarge and bevel (the rim of a hole) so that a screw or bolt can be inserted flush with the surface. 2 sink (a screw etc.) in such a hole.

Webster's 1913 Dictionary

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. 2. To cause to sink even with or below the surface; as, to countersink a screw or bolt into woodwork.

Webster's 1913 Dictionary

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. 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. 2. A drill or cutting tool for countersinking holes.



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