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English definition of “illegal”

illegal

adjective uk   /ɪˈliː.ɡəl/ us  
B2 not allowed by law: a campaign to stop the illegal sale of cigarettes to children under 16 Prostitution is illegal in some countries. It is illegal to drive a car that is not taxed and insured. Cocaine, LSD, and heroin are all illegal drugs/substances.Legal and illegal
illegally
adverb uk   /-i/ us  
B2 They entered the country illegally. an illegally parked carLegal and illegal
(Definition of illegal from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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