Source : Webster's Revised Unabridged Dictionary (1913)

Matin \M[^a]`tin"\, n. [F. m[^a]tin.] (Zo["o]l.)
   A French mastiff.

Matin \Mat"in\, n. [F. fr. L. matutinum the morning, matutinus
   of the morning, Matuta the goddess of the morning. See
   {Matutinal}.]
   1. Morning. [Obs.] --Shak.

   2. pl. [F. matines. See Etymol. above.] Morning worship or
      service; morning prayers or songs.

            The winged choristers began To chirp their matins.
                                                  --Cleveland.

   3. Time of morning service; the first canonical hour in the
      Roman Catholic Church.

Matin \Mat"in\, a.
   Of or pertaining to the morning, or to matins; used in the
   morning; matutinal.