Possessing luster or brilliancy; luminous; bright; shining.Distinguished by greatness, genius, etc.; conspicuous; renowned; eminent: as, an illustrious general or magistrate; an illustrious prince or author.Conferring luster or honor; brilliant; transcendent; glorious.Synonyms and Distinguished, Eminent, etc. (see famous); remarkable, signal, exalted, noble, glorious.