/ Dictionary / Index R road apple: Meaning and Definition of Find definitions for: road' ap"ple Pronunciation: [key] — Slang. Slang. a piece of horse manure on or at the side of a road. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. road agent roadbed Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language