/ Dictionary / Index F family tree: Meaning and Definition of Find definitions for: fam'ily tree' Pronunciation: [key] a genealogical chart showing the ancestry, descent, and relationship of all members of a family or other genealogical group. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. family time family-tree theory Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language