/ Dictionary / Index R radiator grille: Meaning and Definition of Find definitions for: ra'diator grille" Pronunciation: [key] a grille in an automobile or the like for air cooling of the liquid in the cooling system. Random House Unabridged Dictionary, Copyright 1997, by Random House, Inc., on Infoplease. radiator radiatus Related Content Daily Word Quiz: abscond Analogy of the Day: Today?s Analogy Spelling Bee: Today?s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language