Source : Webster's Revised Unabridged Dictionary (1913)

Amour \A*mour"\, n. [F., fr. L. amor love.]
   1. Love; affection. [Obs.]

   2. Love making; a love affair; usually, an unlawful
      connection in love; a love intrigue; an illicit love
      affair.

   {In amours with}, in love with. [Obs.]