paramour

from WordNet (r) 3.0 (2006)

paramour
    n 1: a woman's lover [syn: {fancy man}, {paramour}]
    2: a woman who cohabits with an important man [syn: {concubine},
       {courtesan}, {doxy}, {paramour}]

from The Collaborative International Dictionary of English v.0.48

Paramour \Par"a*mour`\, Paramours \Par"a*mours`\, adv.
   By or with love, esp. the love of the sexes; -- sometimes
   written as two words. [Obs.]
   [1913 Webster]

         For par amour, I loved her first ere thou. --Chaucer.
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Paramour \Par"a*mour\, n. [F. par amour, lit., by or with love.
   See 2d {Par}, and {Amour}.]
   1. A lover, of either sex; a wooer or a mistress (formerly in
      a good sense, now only in a bad one); one who takes the
      place, without possessing the rights, of a husband or
      wife; -- used of a man or a woman.
      [1913 Webster]

            The seducer appeared with dauntless front,
            accompanied by his paramour           --Macaulay.
      [1913 Webster]

   2. Love; gallantry. [Obs.] "For paramour and jollity."
      --Chaucer.
      [1913 Webster] Paramour

from Moby Thesaurus II by Grady Ward, 1.0

18 Moby Thesaurus words for "paramour":
      Casanova, admirer, adorer, amorist, concubine, doxy, follower,
      infatuate, kept mistress, kept woman, lover, mistress, playmate,
      pursuer, suitor, unofficial wife, woman, wooer