Trigamy Law and Legal Definition

Trigamy refers to the act of marrying a person while legally married to someone else and bigamously married to yet another. Trigamy involves three marriages. It is often used in special circumstances where the problem of third wife, stems from the premise that invalidity of the alleged prior marriage is a good defense to a charge of bigamy.

The following is a case law defining trigamy:

Trigamy is the act of having three wives simultaneously.[Braun v. State, 230 Md. 82 (Md. 1962)].