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
Recent Examples on the Web Julie Washington reports the subvariants are also able to evade immunity based on prior infection. Mike Rose, cleveland, 21 July 2022 With immune protection vaccination and prior infection not as effective against the BA.5, face mask wearing becomes all the more important. Bruce Y. Lee, Forbes, 18 July 2022 Like its closely related sibling, BA.4, BA.5 is particularly good at evading the immune protection afforded either by vaccination or prior infection. Peter Hasson, Fox News, 17 July 2022 Officials are worried about the surge of BA.4 and BA.5, which spread easily and can escape immune protection from vaccination or prior infection. Sam Whitehead, CBS News, 16 July 2022 The advisory is in effect for all individuals older than 2 regardless of vaccination status or prior infection. Isaac Yu, Journal Sentinel, 15 July 2022 Travel -- before new subvariants emerged on the scene, at least -- seemed relatively safe again, given immunity to Covid-19 through vaccines, prior infection or both. Peggy Drexler, CNN, 15 July 2022 However, early evidence suggests that the vast majority of people with some immunity, either from prior COVID infection or vaccination, will continue to be protected from severe illness, according to preliminary research. Julia Ries, SELF, 14 July 2022 These are thought to be the most transmissible versions of COVID yet, with the ability to evade immunity from both prior infection and vaccination. Erin Prater, Fortune, 12 July 2022 See More

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.

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

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

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Dictionary Entries Near infection

infectible

infection

infection-exhaustion psychosis

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Last Updated

4 Aug 2022

Cite this Entry

“Infection.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/infection. Accessed 12 Aug. 2022.

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More Definitions for infection

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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