/ Dictionary / Index L loss ratio: Meaning and Definition of Find definitions for: loss' ra"tio Pronunciation: [key] — Insurance. Insurance. the ratio of the losses paid or accrued by an insurer to premiums earned, usually for a period of one year. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lossmaker lossy 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