/ Dictionary / Index U ulto.: Meaning and Definition of Find definitions for: ulto. Pronunciation: [key] ultimo. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ultisol ultra Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language