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Noun: countersink  'kawn-tu(r),singk
  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
    - counterbore, countersink bit
Verb: countersink (countersunk)  'kawn-tu(r),singk
  1. Insert (a nail or screw below the surface, as into a countersink)
    - set

Derived forms: countersunk, countersinks, countersinking

Type of: bit, bury, hole, sink

Encyclopedia: Countersink