/ Dictionary / Index S Sumy: Meaning and Definition of Find definitions for: Su•my Pronunciation: (s'mē Russ. s'mi), [key] — n. a city in NE Ukraine, NW of Kharkov. 228,000. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sum-up sun 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