group of one or more people living in the same dwelling and sharing meals or living accommodation; may consist of a single family or other grouping of people
In economics, a household is the name given to a number of people who live in the same place, and who share a number of things. Very often, this is the case with a family, but this need not be the case. People living in the same household profit, because they can share some of the expenses.
It is an important concept in social security. People in the same household are expected to support each other. Benefits for the poor are generally based on households.