Of adulterous origin; born of adultery.Relating or pertaining to adultery; involving or implying adultery: as, adulterine fiction; adulterine marriage (used by St. Augustine of a second marriage after divorce).Characterized by adulteration; spurious; base: as, adulterine drugs or metals.Illegitimate; illicit; unauthorized: as, adulterine castles (castles built by the Norman barons in England, after the conquest, without royal warrant).n. In civil law, a child begotten in adultery.