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