Search Result for "polygamy": 
Wordnet 3.0

NOUN (1)

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 cf. Polyandry. [1913 Webster] 2. (Zool.) The state or habit of having more than one mate. [1913 Webster] 3. (Bot.) The condition or state of a plant which bears both perfect and unisexual flowers. [1913 Webster]
WordNet (r) 3.0 (2006):

polygamy 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.