infected

adjective

in·​fect·​ed in-ˈfek-təd How to pronounce infected (audio)
Synonyms of infectednext
: having an infection : contaminated with an infective agent (such as a bacterium or virus)
an infected wound
Through a number of different means, these viruses persist at very low, hard-to-detect levels in infected cells.The Journal of the American Medical Association
She explains that leptospirosis bacteria are shed in the urine of infected animals.Tania Banak
The fungus produces as many as 1 million conidia per square centimeter of infected leaf surface.G. B. Lucas

Examples of infected in a Sentence

Recent Examples on the Web
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Her baby was covered with infected sores. Lesley Stahl, CBS News, 16 Feb. 2026 An infection by New World screwworm occurs when an infected fly burrows into the tissue or flesh of warm-blooded animals, and, in rare cases, people. Ciara McCarthy, Fort Worth Star-Telegram, 13 Feb. 2026 Sunbeams through the windows illuminate floating dust motes—and, imperceptibly, microdroplets of mucus carrying the measles virus, expelled from an infected but asymptomatic child who is hopping and laughing among the others. Elizabeth Bruenig, The Atlantic, 12 Feb. 2026 Officials previously sent out more than 170 quarantine orders in late January after an infected child went to school. Charlotte Observer, 10 Feb. 2026 See All Example Sentences for infected

Word History

Etymology

from past participle of infect

First Known Use

1534, in the meaning defined above

Time Traveler
The first known use of infected was in 1534

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Cite this Entry

“Infected.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/infected. Accessed 20 Feb. 2026.

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