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English definition of “fast”

fast

adjective (FIXED)    /fɑːst/ US  /fæst/
If the colour of a piece of clothing is fast, the colour does not come out of the cloth when it is washed .Paints, dyes and pigmentsColour - general wordsWords used to describe textilesContinuous and permanent
(Definition of fast adjective (FIXED) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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