Breadcrumb Home > Dictionary > Index E endurance ratio: Meaning and Definition of Find definitions for: endur'ance ra"tio. Pronunciation: [key] See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. endurance race endurant ✖ Related Content Daily Word Quiz: ultimathule Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language