virus - definition in the Learner's Dictionary - Cambridge Dictionaries Online

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English definition of “virus”

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virus

noun [C]
 
 
/ˈvaɪərəs/
ILLNESS B2 an infectious organism too small to be seen that causes disease, or an illness that it causes: The doctor says I've got a virus.Bacteria, moulds, germs and virusesNot fit and healthyThin or slender (of people)
COMPUTER B1 a program that is secretly put onto a computer in order to destroy the information that is stored on itComputer programming and software
(Definition of virus from the Cambridge Learners Dictionary © Cambridge University Press)
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