1 Having characteristics of both sexes (1) or neither sex. Compare androgynous, hermaphrodite (2).
2 Of or relating to a noun that may refer to either sex (1) without changing its form, such as flight attendant as opposed to air stewardess or firefighter as opposed to fireman. See also political correctness. [From Greek epikoinos common (to both), from epi on + koinos common (to both)]