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English definition of “anti-spam”

anti-spam

adjective [before noun]     /ˌæntiˈspæm/ US   /ˌæntaɪ-/
INTERNET, COMMUNICATIONS intended to prevent spam (= unwanted email) from being received: anti-spam software an anti-spam filter for junk mail Virginia's 2003 anti-spam law was the first to make sending spam a felony.
(Definition of anti-spam adjective from the Cambridge Business English Dictionary © Cambridge University Press)
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