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English definition of “drug”

drug

noun [C] (ILLEGAL SUBSTANCE)    /drʌɡ/
B2 any natural or artificially made chemical that is taken for pleasure, to improve someone's performance of an activity, or because a person cannot stop using it: illegal drugs a drug addict drug addiction/abuse She began to suspect that her son was on/taking/doing drugs. She was suspected of being a drug dealer. His son died of a drug overdose.Drugs - general wordsSpecific types of drug any activity that you cannot stop doing: Work is a drug for him.Passionate or passing interestsAddictionDrug addiction
(Definition of drug noun (ILLEGAL SUBSTANCE) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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