/ Dictionary / Index S sell-back: Meaning and Definition of Find definitions for: sell-back Pronunciation: (sel'bak"), [key] — n. an act or instance of selling something previously purchased. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Sella sell date 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