Countersinking

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  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]