'Brightness' definitions:

Definition of 'brightness'

From: WordNet
noun
The location of a visual perception along a continuum from black to white [ant: dullness]
noun
Intelligence as manifested in being quick and witty [syn: brightness, cleverness, smartness]
noun
The quality of being luminous; emitting or reflecting light; "its luminosity is measured relative to that of our sun" [syn: luminosity, brightness, brightness level, luminance, luminousness, light]

Definition of 'Brightness'

From: GCIDE
  • Brightness \Bright"ness\, n. [AS. beorhines. See Bright.]
  • 1. The quality or state of being bright; splendor; luster; brilliancy; clearness. [1913 Webster]
  • A sudden brightness in his face appear. --Crabbe. [1913 Webster]
  • 2. Acuteness (of the faculties); sharpness 9wit. [1913 Webster]
  • The brightness of his parts . . . distinguished him. --Prior. [1913 Webster]
  • Syn: Splendor; luster; radiance; resplendence; brilliancy; effulgence; glory; clearness. [1913 Webster]

Synonyms of 'brightness'

From: Moby Thesaurus