Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

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.Passing on illness and causing disease 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.Feelings - general words

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.Computer programming and software
(Definition of infect from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of infect?
Add Cambridge dictionaries to your browser to your website

Definitions of “infect” in other dictionaries

Word of the Day

throw

to send something through the air with force, especially by a sudden movement of the arm

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More