Kinship is the relation by the bond of blood, marriage and includes kindered ones. It represents one of the basic social institutions. Kinship is universal and in most societies plays a significant role in the socialization of individuals and the maintenance of group solidarity.
It is very important in primitive societies and extends its influence on almost all their activities.A.R Radcliffe Brown defines kinship as a system of dynamic relations between person and person in a community, the behavior of any two persons in any of these relations being regulated in some way and to a greater or less extent by social usage.
Relation by the bond of blood is called consanguineous kinship such as parents and their children and between children of same parents. Thus son, daughter, brother, sister, paternal uncle etc are consanguineous kin. Each of these is related through blood. Kinship due to marriage is affinal kinship. New relations are created when marriage takes place. Not only man establishes relationship with the girl and the members of her but also family members of both the man and the woman get bound among themselves. Kinship includes Agnates (sapindas, sagotras); cognates (from mother's side) and bandhus (atamabandhus, pitrubandhus, and matrubandhus).