/ Dictionary / Index U ult.: Meaning and Definition of Find definitions for: ult. Pronunciation: [key] ultimate. ultimately. ultimo. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ult (Thesaurus) Ulsterman ulterior Related Content Daily Word Quiz: inane Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language