Bigamy (noun)

The act or condition of marrying while one already has a living spouse; having two or more wives or husbands at the same time.

Origin:

From middle english bigamie, from old french bigamie, from latin bigamia, from bi- + -gamia (from ancient greek γάμος (gámos, "marriage")).

Examples:

1. Bigamy is considered a criminal offense in most countries.
2. The bigamy case was brought to court after the wife found out about the second marriage.
3. Bigamy is a grounds for annulment of marriage.
4. Bigamy is considered a moral offence in most religions.
5. The bigamy was discovered when the second wife attempted to file for divorce.