The Collaborative International Dictionary
Trigamy
Trigamy \Trig"a*my\, n. [L. trigamia,Gr. ?: cf. F. trigamie. See Trigamous.] The act of marrying, or the state of being married, three times; also, the offense of having three husbands or three wives at the same time.
Wiktionary
trigamy
n. 1 The state of having three (legal or illegal) spouses simultaneously. 2 (context ecclesiastical English) A third marriage.
Usage examples of "trigamy".
William Golding risks a trigamy scandal by divorcing his fourth wife, marrying and divorcing his fifth, and then marrying his sixth in the space of a week.