Definition of decolour in English:


(US decolor)


[with object]
  • Remove the colour from.

    • ‘A patent was granted, in the year 1848, to MH Picciotto, for two several methods of purifying and decoloring all varieties of gum-arabic.’
    • ‘Syrups, and many animal, vegetable, and saline solutions, are decoloured or whitened by agitation with animal charcoal.’
    • ‘Egg shells are often used to clear or decolour a white wine.’
    • ‘The powerful action of the kidneys soon relieves the circulation of bile and decolours the eye.’
    • ‘The bacteria only are stained, while all other elements are decolored.’
    make white, turn white, whiten, make pale, turn pale, make pallid, turn pallid, blanch, lighten, fade, wash out, decolorize, peroxide, etiolate
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Late Middle English: from French décolorer or Latin decolorare, from de- (expressing removal or reversal) + Latin colorare ‘to colour’.