Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of countersink is as below...

Countersink :: Countersink (n.) An enlargement of the upper part of a hole, forming a cavity or depression for receiving the head of a screw or bolt..

Countersink :: Countersink (n.) A drill or cutting tool for countersinking holes.

Countersink :: Countersink (v. t.) 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..

Countersinking :: Countersinking (p. pr. & vb. n.) of Countersin.

Countersink :: Countersink (v. t.) To cause to sink even with or below the surface; as, to countersink a screw or bolt into woodwork..

Countersunk :: Countersunk (p. p. & a.) Beveled on the lower side, so as to fit a chamfered countersink; as, a countersunk nailhead..

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