Definition of greyscale adjective from the Oxford Advanced Learner's Dictionary

     

    greyscale

     adjective
    (especially British English)(usually North American English grayscale)adjective
    BrE BrE//ˈɡreɪskeɪl//
     
    ; NAmE NAmE//ˈɡreɪskeɪl//
     
    (specialist)
     
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  1. 1(of an image) produced using only shades of grey, not colour I've printed out the pictures in greyscale.
  2. 2(of a printer or scanner) producing images using only shades of grey, not colour