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English definition of “spyware”

spyware

noun [U]     /ˈspaɪ.weər/ US  /-wer/
software that collects information about how someone uses the internet, or personal information such as passwords, without the user knowing about itComputer programming and software
(Definition of spyware noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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