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Definition of brightness noun from the Oxford Advanced Learner's Dictionary

brightness

noun
 
/ˈbraɪtnəs/
 
/ˈbraɪtnəs/
[uncountable]
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  1. the fact of being full of light or of shining strongly
    • She was momentarily blinded by the brightness of the room.
  2. how bright something is
    • to adjust the brightness (= for example, on a screen)
    • As the brake is applied, the light increases in brightness.
  3. the quality of being bright in colour
    • Repeated use of some washing powders can lead to a loss of brightness in colours.
    Topics Colours and Shapesb2
  4. a cheerful and lively attitude or way of behaving
    • Her brightness and energy kept us all together.
  5. the quality of being intelligent and quick to learn
    • The brightness of these students isn't in doubt.
previously
adverb
 
 
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