/ Dictionary / Index U USTS: Meaning and Definition of Find definitions for: USTS Pronunciation: [key] United States Travel Service: part of the Department of Commerce. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Ust-Kamenogorsk Ust Sysolsk Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language