/ Dictionary / Index S switch engine: Meaning and Definition of Find definitions for: switch' en"gine Pronunciation: [key] — Railroads. Railroads. a locomotive for switching rolling stock in a yard. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. switched-on switcheroo Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language