Source : Webster's Revised Unabridged Dictionary (1913)

Joiner \Join"er\, n.
   1. One who, or that which, joins.

   2. One whose occupation is to construct articles by joining
      pieces of wood; a mechanic who does the woodwork (as
      doors, stairs, etc.) necessary for the finishing of
      buildings. ``One Snug, the joiner.'' --Shak.

   3. A wood-working machine, for sawing, plaining, mortising,
      tenoning, grooving, etc.

   Syn: See {Carpenter}.

Source : WordNet®

joiner
     n 1: a person who likes to join groups
     2: a woodworker whose work involves making things by joining
        pieces of wood