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