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English definition of “Wi-Fi”

Wi-Fi

noun [U]    /ˈwɑɪˈfɑɪ/ trademark
a method of connecting a computer to the Internet or to another computer without using wires: The mayor said his administration would look at making Wi-Fi available citywide at little or no charge.
(Definition of Wi-Fi noun from the Cambridge Academic Content Dictionary © Cambridge University Press)
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