/ Dictionary / Index C coefficient of performance: Meaning and Definition of Find definitions for: coeffi'cient of perform'ance Pronunciation: [key] — Thermodynam. Thermodynam. a constant that denotes the efficiency of a refrigerator, expressed as the amount of heat removed from a substance being refrigerated divided by the amount of work necessary to remove the heat. Abbr.: COP Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. coefficient of fineness coefficient of restitution Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language