/ Dictionary / Index L loss leader: Meaning and Definition of Find definitions for: loss' lead"er Pronunciation: [key] a popular article that is sold at a very low price or at a loss for the purpose of attracting customers to a retail store. Cf. leader (def. 4). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. loss function lossmaker 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