Brightness

Part of speech: noun (n.)

1. The quality or state of being bright; splendor; luster; brilliancy; clearness. A sudden brightness in his face appear. Crabbe.

2. Acuteness (of the faculties); sharpness 9wit. The brightness of his parts . . . distinguished him. Prior.

Synonyms: Splendor; luster; radiance; resplendence; brilliancy; effulgence; glory; clearness.