Bigamy is the condition of having two wives or two husbands at the same time. A marriage in which one of the parties is already legally married is bigamous, void, and ground for annulment. The one who knowingly enters into a bigamous marriage is guilty of the crime of bigamy. Unfortunately, it is seldom prosecuted unless it is part of a fraudulent scheme to get another's property or some other felony. Having several wives at the same time is called "polygamy" and being married to several husbands is "polyandry."