de- prefix definition, meaning - what is de- prefix in the British English Dictionary & Thesaurus - Cambridge Dictionaries Online

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de-

prefix uk   us   /diː-/ /dɪ-/
used to add the meaning "opposite", "remove", or "reduce" to a noun or verb: deforestation the denationalization of the coal industry Once you've written a computer program, you have to debug (= remove the errors from) it.
(Definition of de- prefix from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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