Emily Dickinson Lexicon

IL-LUS'TRI-OUS, a. [Fr. illustre; L. illustris.]

1. Conspicuous; distinguished by the reputation of greatness; renowned; eminent; as, an illustrious general or magistrate; an illustrious prince.
2. Conspicuous; renowned; conferring honor; as, illustrious actions.
3. Glorious; as, an illustrious display of the divine perfection.
4. A title of honor.