PARAMOUR
concubine, courtesan, doxy, paramour
(noun) a woman who cohabits with an important man
Source: WordNet® 3.1
Etymology
Noun
paramour (plural paramours)
(somewhat, archaic) An illicit lover, either male or female.
Synonyms: leman, mistress, Thesaurus:mistress
(obsolete) The Virgin Mary or Jesus Christ (when addressed by a person of the opposite sex).
Adverb
paramour (not comparable)
(obsolete, of loving, etc.) Passionately, out of sexual desire. [from 14thc.]
Synonyms: devotedly, passionately
Source: Wiktionary
Par"a*mour, n. Etym: [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.
The seducer appeared with dauntless front, accompanied by his
paramour Macaulay.
2. Love; gallantry. [Obs.] "For paramour and jollity." Chaucer.
Par"a*mour`, Par"a*mours`, adv.
Definition: By or with love, esp. the love of the sexes; -- sometimes
written as two words. [Obs.]
For par amour, I loved her first ere thou. Chaucer.
Source: Webster’s Unabridged Dictionary 1913 Edition