Source : Webster's Revised Unabridged Dictionary (1913)

Tit \Tit\, n.
   1. A small horse. --Tusser.

   2. A woman; -- used in contempt. --Burton.

   3. A morsel; a bit. --Halliwell.

   4. [OE.; cf. Icel. titter a tit or small bird. The word
      probably meant originally, something small, and is perhaps
      the same as teat. Cf. {Titmouse}, {Tittle}.] (Zo["o]l.)
      (a) Any one of numerous species of small singing birds
          belonging to the families {Parid[ae]} and
          {Leiotrichid[ae]}; a titmouse.
      (b) The European meadow pipit; a titlark.

   {Ground tit}. (Zo["o]l.) See {Wren tit}, under {Wren}.

   {Hill tit} (Zo["o]l.), any one of numerous species of Asiatic
      singing birds belonging to {Siva}, {Milna}, and allied
      genera.

   {Tit babbler} (Zo["o]l.), any one of several species of small
      East Indian and Asiatic timaline birds of the genus
      {Trichastoma}.

   {Tit for tat}. [Probably for tip for tap. See {Tip} a slight
      blow.] An equivalent; retaliation.

   {Tit thrush} (Zo["o]l.), any one of numerous species of
      Asiatic and East Indian birds belonging to {Suthora} and
      allied genera. In some respects they are intermediate
      between the thrushes and titmice.