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1. (v.t.) countersink
to enlarge the upper part of (a hole) to receive the head of a screw or bolt.
2. countersink
to set the head of (a screw or bolt) flush with or below the surface.
3. (n.) countersink
a tool for countersinking a hole.
Etymology: (1810–20)
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| Definition of 'countersink' |
Princeton's WordNet |
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1. (noun) countersink
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. (verb) counterbore, countersink, countersink bit
a bit for enlarging the upper part of a hole
3. (verb) set, countersink
insert (a nail or screw below the surface, as into a countersink)
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| Definition of 'countersink' |
Webster Dictionary |
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1. (noun) countersink
an enlargement of the upper part of a hole, forming a cavity or depression for receiving the head of a screw or bolt
2. (noun) countersink
a drill or cutting tool for countersinking holes
3. (verb) countersink
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
4. (verb) countersink
to cause to sink even with or below the surface; as, to countersink a screw or bolt into woodwork
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Definitions of countersink 
