/ Dictionary / Index G great-uncle: Meaning and Definition of Find definitions for: great-un•cle Pronunciation: (grāt'ung"kul), [key] — n. a granduncle. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: great-uncle (Thesaurus) great toe great unwashed Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language