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English definition of “opium”

opium

noun [U]     /ˈəʊ.pi.əm/ US  /ˈoʊ-/
a drug made from the seeds of a poppy (= red flower) that is used to control pain or to help people sleep. It can make a person who takes it want more of it and is sometimes used by people as an illegal drug for pleasure: an opium addictSpecific types of drugDrugs - general wordsSpecific medicines and drugs
(Definition of opium noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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