Meaning of coefficient of performance

coeffi'cient of perform'ance

Pronunciation: [key]
— Thermodynam. Thermodynam.
  1. 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.