/ Dictionary / Index C Carnot's theorem: Meaning and Definition of Find definitions for: Carnot's' the'orem Pronunciation: [key] — Thermodynam. Thermodynam. the principle that no engine operating between two given temperatures can be more efficient than a Carnot engine operating between the same temperatures. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Carnot refrigerator carnous Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language