firewall definition, meaning - what is firewall in the British English Dictionary & Thesaurus - Cambridge Dictionaries Online

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English definition of “firewall”

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firewall

noun [C] uk   us   /ˈfaɪə.wɔːl/
a device or program that stops people from seeing or using information on a computer without permission while it is connected to the internet
(Definition of firewall from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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