a group of people who are related to one another by bonds of blood, marriage, or adoption and who live together, form an economic unit and bear and raise children 

a group of people which consist of a husband and wife, children from previous marriages, and children (if any) from the new marriage

a social network of people based on common ancestry, marriage, or adoption

a social network of people into which a person is born in and is composed of relatives, in addition to parents and children who live in the same household