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English definition of “infect”

infect

verb [T] uk   /ɪnˈfekt/ us  

infect verb [T] (DISEASE)

C1 to pass a disease to a person, animal, or plant: The ward was full of children infected with TB. All the tomato plants are infected with a virus. C2 If a place, wound, or substance is infected, it contains bacteria or other things that can cause disease: The meat had been infected by E coli bacteria.

infect verb [T] (FEELING)

to make someone have the same feeling or emotion as you: Her optimism seemed to infect all those around her.

infect verb [T] (COMPUTERS)

C1 to pass harmful programs from one computer to another, or within files in the same computer: A computer virus may lurk unseen in a computer's memory, calling up and infecting each of the machine's data files in turn.
(Definition of infect from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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