/ Dictionary / Index A aluminum brass: Meaning and Definition of Find definitions for: alu'minum brass" Pronunciation: [key] an alloy of about 75 percent copper, 2 percent aluminum, small amounts of other elements, and the balance zinc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. aluminum borohydride aluminum bronze Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language