[ad. late L. trigamia, a. Gr. (eccl.) τριγαμία, f. τρίγαμος: see prec. So F. trigamie (Littré).]
1. Eccl. Law. Marriage for the third time after the death of former wives or husbands. ? Obs.
1615. G. Sandys, Trav., 82. For them [priests] it is lawfull to marry: but bigamy is forbidden them, and trigamy detested in the Laity.
172741. Chambers, Cycl., Trigamy, a third marriage; or the state of a person who has been married three times . In the ancient church, trigamy was only allowed to such as had no children by their former marriages.
2. The state of having three wives or husbands at the same time; the crime of contracting a third marriage while two previous spouses are alive.
a. 1634. Coke, On Litt., III. xxvii. (1648), 88. The difference between Bygamy, or Trigamy, &c. and Polygamy.
1706. Phillips (ed. Kersey), Trigamy, (Gr.) the having three Husbands or three Wives at once.
1819. Caledonian Mercury, 2 Aug., 2/2. It was generally supposed, that a third claimant would have transposed the accusing word [bigamy] to that of trigamy.
1884. Chr. World, 16 Oct., 795/5. A woman 30 years of age was charged with trigamy, all three husbands being still alive.