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English definition of “narcotic”

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narcotic

noun [C] uk   /nɑːˈkɒt.ɪk/ us    /nɑːrˈkɑːt̬-/
mainly US an illegal drug such as heroin or cocaine : He faces three years in jail for selling narcotics. specialized medical a drug that makes you want to sleep and prevents you feeling pain: Morphine is a narcotic.

narcotic

adjective uk   /nɑːˈkɒt.ɪk/ us    /nɑːrˈkɑːt̬-/
relating to drugs that make you want to sleep and prevent pain: narcotic drugs a narcotic effect
(Definition of narcotic from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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