/ Dictionary / Index P postheat: Meaning and Definition of Find definitions for: post•heat Pronunciation: (pōst-hēt'), [key] — v.t. to heat (a metal piece, as a weld) after working, so as to relieve stresses. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. posthaste post hoc* Related Content Daily Word Quiz: designate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language