/ Dictionary / Index G gainless: Meaning and Definition of Find definitions for: gain•less Pronunciation: (gān'lis), [key] — adj. unprofitable. unavailing. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. gaingiving gainly Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language