Definition of infect
1 : to contaminate with a disease-producing substance or agent (as bacteria)
2 a : to communicate a pathogen or a disease to b of a pathogenic organism : to invade (an individual or organ) usually by penetration c of a computer virus : to become transmitted and copied to (as a computer)
3 a : contaminate, corrupt <the inflated writing that infects such stories> b : to work upon or seize upon so as to induce sympathy, belief, or support <trying to infect their salespeople with their enthusiasm>
infectorplay \-ˈfek-tər\ noun
Examples of infect in a sentence
If you're sick you should stay home to avoid infecting other people in the office.
The virus has infected many people.
They were unable to prevent bacteria from infecting the wound.
Her enthusiasm has infected everyone.
The virus has infected many computers.
All the computers in the office were infected by the same virus.
Origin and Etymology of infect
Middle English, from Latin infectus, past participle of inficere, from in- + facere to make, do — more at do
First Known Use: 14th century
INFECT Defined for English Language Learners
Definition of infect for English Language Learners
: to cause (someone or something) to become sick or affected by disease
: to cause (someone) to feel an emotion
of an emotion : to spread to (other people)
INFECT Defined for Kids
Definition of infect for Students
1 : to pass on or introduce a germ, illness, or disease to : to cause sickness in <Don't infect me with your cold.> <The bacteria can infect wounds.>
2 : to cause to share similar feelings <Her enthusiasm infects the other players.>
Seen and Heard
What made you want to look up infect? Please tell us where you read or heard it (including the quote, if possible).