/ Dictionary / Index R red stuff: Meaning and Definition of Find definitions for: red' stuff" Pronunciation: [key] a compound of oil and sesquioxide of iron used for polishing brass, steel, silver, etc.; crocus or rouge. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Redstone red tag Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language