Definition of decolour in English:

decolour

(US decolor)

verb

[WITH OBJECT]
  • Remove the colour from.

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

Origin

Late Middle English: from French décolorer or Latin decolorare, from de- (expressing removal or reversal) + Latin colorare ‘to colour’.

Pronunciation

decolour

/diːˈkʌlə/