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. 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)
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

from the word go

from the start of something

Word of the Day

Countability – grammar codes

by Dom Glennon​​,
November 26, 2014
Advices and informations Have you ever noticed strange codes in square brackets on entries in Cambridge Dictionaries Online and wondered what they mean? These are grammar codes, giving you a brief summary of how that word behaves grammatically. More information can be obtained by hovering your cursor over the code, and there’s

Read More 

ped-text verb

November 24, 2014
to text someone while walking I’m ped-texting, I’m looking down at my phone, 75 percent of the time.

Read More