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English definition of “illegal”

illegal

adjective     /ɪˈliːɡəl/
B2 not allowed by law: illegal drugs/weapons [+ to do sth] It is illegal to sell cigarettes to anyone under 16.Legal and illegal
illegally adverb B2 an illegally parked car
(Definition of illegal adjective from the Cambridge Learner's Dictionary © Cambridge University Press)

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