/ Dictionary / Index R railroad flat: Meaning and Definition of Find definitions for: rail'road flat" Pronunciation: [key] an apartment whose series of narrow rooms forms a more or less straight line. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. railroader railroading Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language