2021-5-27 · paramour ( plural paramours ) (somewhat archaic) An illicit lover, either male or . quotations . Synonyms: leman, mistress; see also Thesaurus: mistress. to run away with a paramour. 1848, Thomas Maucalay, ''The History of England from the Accession of James the Second'': The seducer appeared with dauntless front, accompanied by his paramour.