/ Dictionary / Index A aluminous: Meaning and Definition of Find definitions for: a•lu•mi•nous Pronunciation: (u-l'mu-nus), [key] — adj. of the nature of or containing alum or alumina. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: aluminous (Thesaurus) aluminothermy aluminum 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