[oreg.a.no] n [AmerSp oregano, fr. Sp, wild marjoram, fr. L origanum--more at origanum] (1771) 1: a bushy perennial mint (Origanum vulgare) that is used as a seasoning and a source of aromatic oil--called also origanum, wild marjoram
2: any of several plants (genera Lippia and Coleus) other than oregano of the vervain or mint families