/ Dictionary / Index F fatigue ratio: Meaning and Definition of Find definitions for: fatigue' ra"tio Pronunciation: [key] the ratio between the fatigue limit and the tensile strength of a material. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fatigue limit Fatiha Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language