1. a kinship group consisting of a family nucleus and various relatives, as grandparents, usually living in one household and functioning as a larger unit. Cf. nuclear family.
2. (loosely) one's family conceived of as including aunts, uncles, cousins, in-laws, and sometimes close friends and colleagues.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.