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English definition of “unauthorized”

unauthorized

adjective (UK also unauthorised)     /ʌnˈɔːθəraɪzd/
not officially allowed: He concealed huge losses made from unauthorized trading on Asian futures markets. Unauthorized entry into the United States is illegal, but being in the country after having entered illegally is not necessarily a crime. The company has started to more aggressively prosecute unauthorized use of its technology.
(Definition of unauthorized adjective from the Cambridge Business English Dictionary © Cambridge University Press)
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