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English definition of “dirty”

dirty

adjective     /ˈdɜːti/
unfair or dishonest : The rival company's dirty tricks campaign had cost it many millions of pounds . a dirty campaign / business dirty dealings / politics / tactics
ENVIRONMENT containing dangerous substances that may be harmful to the environment : dirty air dirty coal plants
do sb's dirty work to do something unpleasant or difficult for someone because they do not want to do it themselves: The building societies have done the chancellor's dirty work for him, by cutting the cost of a mortgage in anticipation of a base rate cut .
quick and dirty produced quickly and without spending much money : Developers make quick and dirty versions of the final product so that the client can interact with it and provide feedback .
(Definition of dirty adjective from the Cambridge Business English Dictionary © Cambridge University Press)
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