Definition of colour-blindness noun from the Oxford Advanced Learner's Dictionary

     

    colour-blindness

     noun
    noun
    BrE
     
    ; NAmE
     
    (especially US English color-blindness)[uncountable]
     
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  1. 1the inability to see the difference between some colours, especially red and green
  2. 2the practice of treating people with different coloured skin in exactly the same way