(intransitive, graphic design, photography) To inadvertently or intentionally reduce the number of colours in a photograph or other image, changing a continuous gradation of tone to several regions of fewer tones with abrupt changes from one tone to another.
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Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
See all Regional & Other slang on Slangora.