infest

verb

in·​fest in-ˈfest How to pronounce infest (audio)
infested; infesting; infests

transitive verb

1
: to spread or swarm in or over in a troublesome manner
a slum infested with crime
shark-infested waters
2
: to live in or on as a parasite
infestant noun
infestation noun
infester noun

Examples of infest in a Sentence

in desperation, we called in an exterminator because the house was infested with ants
Recent Examples on the Web According to the building code update, a structure is categorized as unfit for people to live in if the building is dirty, infested with pests or lacks basic facilities such as proper lighting and heating. Ben Terzi, Baltimore Sun, 14 Mar. 2024 Monica Johnston Johnston, in a phone interview from the hospital, talked of flies infesting the operating room and the intensive care unit. Jane Arraf, NPR, 13 May 2024 Corman was the executive producer of this horror film about a mass of flesh-eating piranhas infesting a river. Greg Braxton, Los Angeles Times, 12 May 2024 This includes eliminating the mice, rats and cockroaches that infest their units. Noelle Alviz-Gransee, Kansas City Star, 3 May 2024 See all Example Sentences for infest 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'infest.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

French infester, from Latin infestare, from infestus hostile

First Known Use

1602, in the meaning defined at sense 1

Time Traveler
The first known use of infest was in 1602

Dictionary Entries Near infest

Cite this Entry

“Infest.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/infest. Accessed 14 Jun. 2024.

Kids Definition

infest

verb
in·​fest in-ˈfest How to pronounce infest (audio)
1
: to spread or swarm in or over in a troublesome manner
a neighborhood infested with crime
shark-infested waters
2
: to live in or on as a parasite
horses infested with worms
infestation noun

Medical Definition

infest

transitive verb
in·​fest in-ˈfest How to pronounce infest (audio)
: to live in or on as a parasite
the flea that infests cats
horses infested with worms
compare infect

More from Merriam-Webster on infest

Last Updated: - Updated example sentences
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