infection

noun
in·​fec·​tion | \ in-ˈfek-shən How to pronounce infection (audio) \

Definition of infection

1a : the state produced by the establishment of one or more pathogenic agents (such as a bacteria, protozoans, or viruses) in or on the body of a suitable host an infection in his foot
b : a disease resulting from infection contagious infections infections of childhood
2 : an act or process of infecting something or someone also : the establishment of a pathogen in its host after invasion
3 : an infectious agent or material contaminated with an infectious agent … that notion that the infection was all in the air, that there was no such thing as contagion from the sick people to the sound …— Daniel Defoe It may not be uninteresting to add, that this case I vaccinated with infection taken from a secondary pock on the arm of her sister …— John Redman Coxe
4 : the communication of emotions or qualities through example or contact But immediately she resisted this intolerable fear as an infection from her husband's way of thinking.— George Eliot also : the emotion or quality that is communicated … as the evening wore on, she caught the infection of their excitement … — Thomas Hardy Besides, I know what sort of a mind I have placed in communication with my own: I know it is one not liable to take infection— Charlotte Brontë
5 : the act or result of corrupting someone's morals, character, etc. … it is at least as difficult to stay a moral infection as a physical one …— Charles Dickens … they could not know the origin—or the depth—of his susceptibility to the infection of power.— Robert A. Caro

Examples of infection in a Sentence

Poor hygiene can increase the danger of infection. The wound has so far remained free of infection. steps you can take to decrease your computer's risk of infection
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Recent Examples on the Web Among all 50 states, California has the third-lowest seven-day death rate per capita and the seventh-lowest seven-day infection rate per capita. Eric Levenson And Cheri Mossburg, CNN, 15 June 2021 Our infection rate is among the lowest in the nation, our vaccination rates among the highest. Los Angeles Times, 12 June 2021 Venezuela is scheduled to play Brazil in the opening match of the tournament Sunday, which was relocated to Brazil from Argentina and Colombia due to the high Covid-19 infection rate in the former and social unrest in the latter. Graison Dangor, Forbes, 12 June 2021 Arizona's infection rate is 12,159 cases per 100,000 people, according to the CDC. Alison Steinbach, The Arizona Republic, 11 June 2021 If the state were only testing sick people, or the infection rate was greater, the positivity rate would be far higher. Colin Campbell, baltimoresun.com, 11 June 2021 Fauci also talks about the latest in HIV/AIDS research and why the HIV infection rate in the Black community is of particular concern to him. Lz Granderson, ABC News, 10 June 2021 New York’s high infection rate may be because the state suffered from a very early wave for which officials were unprepared, according to the report. Danielle Echeverria, San Francisco Chronicle, 10 June 2021 Prayuth said the Health Ministry had confirmed that vaccinations could begin Monday in every province, and vaccines would be allocated according to the infection rate in each area. Star Tribune, 7 June 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'infection.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of infection

14th century, in the meaning defined at sense 2

History and Etymology for infection

Middle English infeccioun "morbid condition of a body part, disease, contamination," borrowed from Anglo-French & Late Latin; Anglo-French infeccioun, enfection, borrowed from Late Latin infectiōn-, infectiō "influence, process of dyeing, communication of disease, contamination," from Latin infec-, variant stem of inficere "to dye, discolor, taint, contaminate with disease" + -tiōn-, -tiō, suffix of verbal action — more at infect

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Time Traveler for infection

Time Traveler

The first known use of infection was in the 14th century

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Statistics for infection

Last Updated

17 Jun 2021

Cite this Entry

“Infection.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/infection. Accessed 24 Jun. 2021.

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More Definitions for infection

infection

noun

English Language Learners Definition of infection

: the act or process of infecting someone or something : the state of being infected
: a disease caused by germs that enter the body

infection

noun
in·​fec·​tion | \ in-ˈfek-shən How to pronounce infection (audio) \

Kids Definition of infection

1 : the act or process of passing on or introducing a germ, illness, or disease to : the state of being infected
2 : any disease caused by germs an ear infection

infection

noun
in·​fec·​tion | \ in-ˈfek-shən How to pronounce infection (audio) \

Medical Definition of infection

1a : the state produced by the establishment of one or more pathogenic agents or microorganisms (as bacteria, viruses, protozoans, or fungi) in or on the body of a suitable host treated a bacterial infection of the eye
b : a disease resulting from infection : infectious disease common infections of childhood contagious infections
2 : an act or process of infecting something or someone syphilis infection is chiefly venereal also : the establishment of a pathogen in its host after invasion
3 : an infectious agent or material contaminated with an infectious agent

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