/ Dictionary / Index P preheat: Meaning and Definition of Find definitions for: pre•heat Pronunciation: (prē-hēt'), [key] — v.t. to heat before using or before subjecting to some further process: to preheat an oven before baking a cake. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: preheat (Thesaurus) pregnant prehensible Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language