The Collaborative International Dictionary of English v.0.48:

Matin \M[^a]`tin"\, n. [F. m[^a]tin.] (Zool.)
   A French mastiff.
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The Collaborative International Dictionary of English v.0.48:

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.
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   2. pl. [F. matines. See Etymol. above.] Morning worship or
      service; morning prayers or songs.
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            The winged choristers began
            To chirp their matins.                --Cleveland.
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   3. Time of morning service; the first canonical hour in the
      Roman Catholic Church.
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The Collaborative International Dictionary of English v.0.48:

matin \mat"in\, a.
   Of or pertaining to the morning, or to matins; used in the
   morning; matutinal.
   [1913 Webster]