1. having more than one spouse at a time
The Collaborative International Dictionary of English v.0.48:
Polygamy \Po*lyg"a*my\, n. [Gr. ?; cf. F. polygamie.]
1. 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
2. (Zool.) The state or habit of having more than one mate.
3. (Bot.) The condition or state of a plant which bears both
perfect and unisexual flowers.
WordNet (r) 3.0 (2006):
n 1: having more than one spouse at a time
Moby Thesaurus II by Grady Ward, 1.0:
20 Moby Thesaurus words for "polygamy":
beena marriage, bigamy, common-law marriage, companionate marriage,
concubinage, deuterogamy, left-handed marriage, levirate,
leviration, love match, marriage of convenience, monandry,
monogamy, monogyny, morganatic marriage, picture marriage,
polyandry, polygyny, trial marriage, trigamy
Bouvier's Law Dictionary, Revised 6th Ed (1856):
POLYGAMY, crim. law. The act of a person who, knowing he has two or more
wives, or she has two or more husbands living, marries another. It differs
from bigamy. (q.v.) Com. Dig. Justices, S 5, Dict. de Jur. h.t.
The Devil's Dictionary (1881-1906):
POLYGAMY, n. A house of atonement, or expiatory chapel, fitted with
several stools of repentance, as distinguished from monogamy, which
has but one.