/ Dictionary / Index R roughage: Meaning and Definition of Find definitions for: rough•age Pronunciation: (ruf'ij), [key] — n. rough or coarse material. any coarse, rough food for livestock. fiber (def. 9). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: roughage (Thesaurus) rough rough-and-ready 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