/ Dictionary / Index L losing: Meaning and Definition of Find definitions for: los•ing Pronunciation: (l'zing), [key] — adj. causing or suffering loss. —n. losses. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: losing (Thesaurus) Los Gatos losing hazard Related Content Daily Word Quiz: modify Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language