/ Dictionary / Index D duralumin: Meaning and Definition of Find definitions for: du•ral•u•min Pronunciation: (doo-ral'yu-min, dyoo-), [key] — n. an alloy of aluminum that is 4 percent copper and contains small amounts of magnesium, manganese, iron, and silicon: used for applications requiring lightness and strength, as in airplane construction. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: duralumin (Thesaurus) dural dura mater Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language