de- Definition in the Cambridge English Dictionary
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Definition of “de-” - English Dictionary

Definition of "de-" - British English Dictionary

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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 ​coalindustry Once you've written a ​computerprogram, you have to ​debug (= ​remove the ​errors from) it.
written abbreviation for the US ​state of Delaware: used in ​addresses
(Definition of de- from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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