The Collaborative International Dictionary of English v.0.48:

Inamorato \In*a`mo*ra"to\, n.; pl. Inamoratos. [See
   Inamorata.]
   A male lover.
   [1913 Webster]

WordNet (r) 3.0 (2006):

inamorato
    n 1: a man with whom you are in love or have an intimate
         relationship