1A family living together harmoniously (frequently as a conventional description). Also figurative: a group characterized by high morale, team spirit, etc.

2A collection of diverse animals (or fish) living together in harmony in one cage (or tank, etc.), especially one exhibited as a curiosity.

3In plural A children's card game played with a pack of special cards, each card depicting on its face a member of a ‘family’ of four.

4Australian. Either of two songbirds that typically occur in small groups: the apostlebird or grey jumper, Struthidea cinerea (family Corcoracidae), and the grey-crowned babbler, Pomatostomus temporalis (family Pomatostomidae). In later use also: any Australasian babbler of the family Pomatostomidae.