/ Dictionary / Index L lustrous: Meaning and Definition of Find definitions for: lus•trous Pronunciation: (lus'trus), [key] — adj. having luster; shining; luminous: lustrous eyes. brilliant; splendid; resplendent; illustrious: a lustrous career. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lustrous (Thesaurus) lustre lustrum Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language