/ Dictionary / Index R Red No. 2: Meaning and Definition of Find definitions for: Red No. 2 Pronunciation: [key] an artificial red dye used in foods, drugs, and cosmetics: banned by the FDA in 1976 as a possible carcinogen. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. redness red nose Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language