/ Dictionary / Index H heat-treat: Meaning and Definition of Find definitions for: heat-treat Pronunciation: (hēt'trēt"), [key] — v.t. to subject (a metal or alloy) to controlled heating and cooling to improve hardness or other properties. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. heatstroke heat wave Related Content Daily Word Quiz: voracious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language