/ Dictionary / Index U Ust Sysolsk: Meaning and Definition of Find definitions for: Ust Sy•solsk Pronunciation: (Russ. st' si-sôlsk'), [key] former name of Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. USTS ustulate 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