Definition of malware noun from the Oxford Advanced American Dictionary

 

malware

 noun
noun
NAmE//ˈmælwɛr//
 
[uncountable]
 
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software such as a virus on a computer or computer network that the user does not know about or want the threat posed by malware How to protect yourself against malware. Responding to the pop-up will get you a nice case of malware! A combination of malicious and software.
See the Oxford Advanced Learner's Dictionary entry: malware