/ Dictionary / Index J joint family: Meaning and Definition of Find definitions for: joint' fam'ily Pronunciation: [key] a type of extended family composed of parents, their children, and the children's spouses and offspring in one household. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. jointer plane joint ill Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language