Meaning of “infect” in the English Dictionary

"infect" in British English

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infectverb [ T ]

uk /ɪnˈfekt/ us /ɪnˈfekt/

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 ] (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 Learner’s Dictionary & Thesaurus © Cambridge University Press)

"infect" in American English

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infectverb [ T ]

us /ɪnˈfekt/

to cause disease in someone by introducing organisms such as bacteria or viruses:

Mosquitoes can infect people with malaria.
fig. Fear of an attack infected the entire city.
infected
adjective [ not gradable ] us /ɪnˈfek·tɪd/

an infected toe
infection
noun [ C/U ] us /ɪnˈfek·ʃən/

[ C ] a sinus infection

(Definition of “infect” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"infect" in Business English

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infectverb [ T, often passive ]

uk /ɪnˈfekt/ us

IT to damage a computer's software or data with a harmful program that has been passed from another computer:

be infected by/with sth The hackers hijacked personal computers that had been previously infected by a virus.
an infected website

to pass a disease to a person, animal, or plant:

be infected by/with sth A lab worker had been infected with a potentially dangerous agent.
There was an alarming report of meat from infected animals being sold to supermarkets.

(Definition of “infect” from the Cambridge Business English Dictionary © Cambridge University Press)