Definition from Wiktionary, the free dictionary
Alternative forms 
paramour (not comparable)
- (obsolete, of loving, etc.) Passionately, out of sexual desire; devotedly. [from 14th c.]
- For par amour I loved her first ere thou.
- 1485, Thomas Malory, Le Morte Darthur, Book X:
- And as for to say that I love La Beall Isode paramoures, I dare make good that I do, and that she hath my servyse abovyn all other ladyes, and shall have, all the terme of my lyff.
paramour (plural paramours)