/ Dictionary / Index O overhead-valve engine: Meaning and Definition of Find definitions for: o'ver•head-valve' en"gine Pronunciation: (ō'vur-hed"valv'). [key] See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. overhead railway overhear Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language