The having of a plurality of wives or husbands at the same time; usually, the marriage of a man to more than one woman, or the practice of having several wives, at the same time; -- opposed to monogamy; as, the nations of the East practiced polygamy. See the Note under Bigamy, and cf. Polyandry.
- The condition or practice of having more than one spouse at one time. Also called plural marriage.
- Zoology A mating pattern in which a single individual mates with more than one individual of the opposite sex.