Polygamy

The term polygamy (many marriages in late Greek) is used in related ways in social anthropology, sociobiology, and sociology

In social anthropology, polygamy is the practice of marriage to more than one spouse simultaneously. Historically, polygamy has been practiced as polygyny (one man having more than one wife), or as polyandry (one woman having more than one husband), or, less commonly as "polygamy" (having many wives and many husbands at one time). (See "Forms of Polygamy" below.) In contrast monogamy is the practice of each person having only one spouse at a time. Like monogamy, the term is often used in a de facto sense, applying regardless of whether the relationships are recognized by the state (see marriage for a discussion on the extent to which states can and do recognize potentially and actually polygamous forms as valid).

In sociobiology, polygamy is used in a broad sense to mean any form of multiple mating. In a narrower sense, used by zoologists, polygamy includes a pair bond, perhaps temporary.