Source : Webster's Revised Unabridged Dictionary (1913)

Jointing \Joint"ing\, n.
   The act or process of making a joint; also, the joints thus
   produced.

   {Jointing machine}, a planing machine for wood used in
      furniture and piano factories, etc.

   {Jointing plane}. See {Jointer}, 2.

   {Jointing rule} (Masonry), a long straight rule, used by
      bricklayers for securing straight joints and faces.