/ Dictionary / Index H heat capacity: Meaning and Definition of Find definitions for: heat' capac"ity Pronunciation: [key] — Thermodynam. Thermodynam. the heat required to raise the temperature of a substance one degree. Cf. specific heat. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. heat barrier heat content Related Content Daily Word Quiz: blanch Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language