/ Dictionary / Index G gainer: Meaning and Definition of Find definitions for: gain•er Pronunciation: (gā'nur), [key] — n. a person or thing that gains. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: gainer (Thesaurus) gain Gaines Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language