/ Dictionary / Index G guide rail: Meaning and Definition of Find definitions for: guide' rail" Pronunciation: [key] a track or rail designed to control the movement of an object, as a door or window. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. guidepost guide right Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language