Relating to or characterized by polygamy: as, polygamous marriage (a union including more than one spouse of either sex, sanctioned in respect to plurality of wives by the law of some countries, but not recognized as marriage by the law of Christian states).In zoöl mating with more than one individual of the opposite sex; polyandrous or polygynous, especially the latter, which is more frequent among animals than the former.In botany, bearing both unisexual and bisexual or hermaphroditic flowers in the same species.