Marriage: H.M. Johnson has defined marriage as a stable relationship in which a man and a women are socially permitted, without loss of standing in community, to have children.
Affinal Relation: Relationship by marriage like husband and wife.
Exogamy: Marriage outside a defined group e.g. gotra, village.
Endogamy : Marriage within a defened group. e.g. kinship, caste.
Hypogamy: Marriage of daughter to a man of lower caste class.
Hypergamy : Marriage of daughter with a man of higher class or caste.
Taboo : Prohibited conduct or behaviours.
Consanguineous Relation: Relationship blood like brother and sister.