exogamy
(noun)
 Marriage to a person belonging to a tribe or group other than your own as required by custom or law.
Examples of exogamy in the following topics:
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The Incest Taboo, Marriage, and the Family- Another school argues that the incest prohibition is a cultural construct that arises as a side effect of a general human preference for group exogamy.
- According to this view, the incest taboo is not necessarily a universal, but it is likely to arise and become stricter under cultural circumstances that favor exogamy over endogamy; it likely to become more lax under circumstances that favor endogamy.
- Endogamy is the opposite of exogamy; it refers to the practice of marriage between members of the same social group.
- Class, caste, ethnic and racial endogamy typically coexists with family exogamy and prohibitions against incest.
- Analyze the different constructs of the incest taboo, ranging from biological (the Westermarck effect) to cultural (endogamy and exogamy)
 
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Family- Incest taboo may serve to promote social solidarity and is a form of exogamy.
- Exogamy can be broadly defined as a social arrangement according to which marriages can only occur with members outside of one's social group.
 
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Families and Theory- These sorts of restrictions are a form of exogamy.
- The consequence of the incest-taboo is exogamy, the requirement to marry someone from another group.
 
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Mate Selection- This is called exogamy, and is common in societies that practice totemic religion, in which society is divided into a number of distinct, exogamous, totemic clans.