Extended family is a family in which relatives – such as grandparents, aunts, or uncles – live in the same home as parents and their children.
Definition Two:
Extended family is a family group consisting of more than two generations of the same kinship line living either within the same household or, as is more common in the West, very close to one another.
Extended family can be defined as differently for different societies but always includes more distant relations (both genetically and geographically) than the nuclear family with which it is contrasted.