Noun

1. All the persons who live in the same individual residence at a given time.
2. A line of ancestry.

Usage notes

The meanings of the noun referring to those living in the same residence are similar in wording, but substantially different in meaning. The first definition was the former meaning, expanded in the mid-20th century. Ample context should be provided to distinguish which meaning is intended, or your readers will assume their own preferred meaning.

Adjective

1. Belonging to the same house and family.
2. Of anything found in or having its origin in a home.