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

In addition to the potential for infections and resulting tissue loss, or worse, there are likely ramifications for the ability to localize sound. Kaleigh Fasanella, Allure, "A Man Had Part of His Ear Cut Out in a Controversial “Conch Removal” Procedure," 28 Mar. 2019 However, regularly holding in your pee can theoretically put you at higher risk for urinary tract infections. Kimberly Truong, SELF, "Is ‘Breaking the Seal’ When You Drink Alcohol Really a Thing?," 16 Mar. 2019 In 2009, he was treated for a massive listeria infection—a sickness that is often fatal. Jason Zweig, WSJ, "What Drove Jack Bogle to Upend Investing," 18 Jan. 2019 The disease was detected by accident at an early stage after Ginsburg had gone to the doctor for an abdominal infection. Julia Belluz, Vox, "Ruth Bader Ginsburg’s incredible ability to bounce back," 14 Dec. 2018 Eight of the boys are still under quarantine as doctors examine them for infection. Rebecca Farley, refinery29.com, "The Harrowing Tale Of The Boys In The Cave Is Already Going To Be A Movie," 11 July 2018 Two of the three have to do with water, which presents one of the greatest risks for eye infection to contact wearers, says Haberman. Katie Heaney, The Cut, "Are My Contacts Going to Make Me Go Blind?," 11 July 2018 Two have been treated for minor lung infections, doctors added. Washington Post, BostonGlobe.com, "How the world came together to save 12 boys trapped in a Thai cave," 10 July 2018 All of the boys, the last of whom were pulled out by an international team of divers Tuesday after being trapped since June 23, have been quarantined while they are tested for infections. Caroline Simon, USA TODAY, "The Thai soccer team is out of the cave. But the road to recovery is just beginning.," 10 July 2018

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

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Statistics for infection

Last Updated

12 May 2019

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Time Traveler for infection

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

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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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More from Merriam-Webster on infection

Rhyming Dictionary: Words that rhyme with infection

Spanish Central: Translation of infection

Nglish: Translation of infection for Spanish Speakers

Britannica English: Translation of infection for Arabic Speakers

Britannica.com: Encyclopedia article about infection

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