- The definition of a paramour is a lover or romantic partner.
An example of paramour is the girlfriend of a married man.
paramour definition by Webster's New World
- a lover or mistress; esp., the illicit sexual partner of a married man or woman
- Archaic a sweetheart
Origin: Middle English ; from par amur ; from Old French par amour, with love ; from par (L per), by plush amour (L amor), love
paramour definition by American Heritage Dictionary
Origin: Middle English, from par amour, by way of love, passionately, from Anglo-Norman : par, by (from Latin per; see per1 in Indo-European roots) + amour, love (from Latin amor, from amāre, to love).