marriage within one's own tribe or group as required by custom or law
The custom of marrying only within the limits of a local community, clan or tribe (The New Shorter Oxford English Dictionary 1993, Volume 1, A-M p817)
inmarriage, marriage to an individual within a defined social group, category, or range.
a rule requiring marriage within a specified social or kinship group.
The practice of marrying within a social group. Endogamous societies have a high number of first and second cousin marriages.
This refers to marrying within the race.
Marriage to a person within one's own group (kin, caste, community).
Rules (not necessarily codified) requiring marriage within a group, e.g. religion, class, ethnicity. Endogamy strengthens ties within a group. (See exogamy)
Endogamy is the practice of marrying within a social group. Cultures who practice endogamy require marriage between specified social groups, classes, or ethnicities. A Danish endogamist would require marriage only to other Danes.