infect
Americanverb (used with object)
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to affect or contaminate (a person, organ, wound, etc.) with disease-producing germs.
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to affect with disease.
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to taint or contaminate with something that affects quality, character, or condition unfavorably.
to infect the air with poison gas.
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to corrupt or affect morally.
The news of the gold strike infected him with greed.
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to imbue with some pernicious belief, opinion, etc.
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to affect with a computer virus.
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to affect so as to influence feeling or action.
His courage infected the others.
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Law. to taint with illegality, or expose to penalty, forfeiture, etc.
verb (used without object)
adjective
verb
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to cause infection in; contaminate (an organism, wound, etc) with pathogenic microorganisms
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(also intr) to affect or become affected with a communicable disease
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to taint, pollute, or contaminate
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to affect, esp adversely, as if by contagion
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computing to affect with a computer virus
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international law to taint with crime or illegality; expose to penalty or subject to forfeiture
adjective
Usage
What does infect mean? Infect is a verb that means to taint someone or something with disease-causing germs or to spread a disease to another living thing, as in The doorknob was infected with disease-causing bacteria. Infect can also mean to taint something in a way that negatively affects quality, as in The water was infected with toxic chemicals. Computers and other devices that connect to the internet can also become infected. Instead of a virus of living organisms infecting your computer, though, bits of code attack your computer system to do harm.Infect is also used figuratively to mean to corrupt something in various ways. It can mean something was corrupted morally, as in The constant flattery caused him to be infected with hubris. Infect can also be used to mean someone has been corrupted by harmful thoughts or beliefs, as in He allowed hatred to infect his mind. The adjective infectious is used to mean something is capable of infecting things, as in Doctors worked to stop the spread of the infectious disease. Infect can be confused with infest, which means to overrun a place or live there in an unwanted manner.Example: Tia stayed home from school so she wouldn’t infect her classmates with the flu.
Other Word Forms
- infectant adjective
- infectedness noun
- infecter noun
- infector noun
- noninfected adjective
- noninfecting adjective
- preinfect verb (used with object)
- reinfect verb (used with object)
- uninfected adjective
Etymology
Origin of infect
1350–1400; Middle English infecten < Latin infectus (past participle of inficere to immerse in dye, discolor, taint, poison), equivalent to in- in- 2 + -fec-, combining form of facere to do 1, make ( fact ) + -tus past participle suffix
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
These structures may help the fungus search for nutrients while infecting a host.
From Science Daily
Scientists studying ancient sewer drains at the Roman fort of Vindolanda, located near Hadrian's Wall, have uncovered evidence that the people living there were infected with three different intestinal parasites: roundworm, whipworm, and Giardia duodenalis.
From Science Daily
A disinfection problem at Pembury Water Treatment Works had caused the failure but there was no evidence supply became infected, said South East Water.
From BBC
There are questions about what happens over Christmas when everyone meets up and it's easier for the virus to infect older people who are more at risk.
From BBC
By tracking primary and secondary infections, the researchers estimated key transmission metrics, including the basic reproductive number, R0 - which measures how many people, on average, one infected person passes the virus on to.
From BBC
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
