outbreak

noun

out·​break ˈau̇t-ˌbrāk How to pronounce outbreak (audio)
1
a
: a sudden or violent increase in activity or currency
the outbreak of war
b
: a sudden rise in the incidence of a disease
an outbreak of measles
c
: a sudden increase in numbers of a harmful organism and especially an insect within a particular area
an outbreak of locusts
2

Examples of outbreak in a Sentence

there was an immediate outbreak of paper shuffling and a pretense of work when the supervisor passed through the room the government quelled the outbreak with ruthless efficiency
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Early supply chain disruptions due to the outbreak of the COVID-19 pandemic were blamed with kicking off higher prices. Alexander Coolidge, Cincinnati Enquirer, 3 Oct. 2025 There have been three prominent Listeria outbreaks recorded in the United States this year connected to prepared foods, including pasta meals such as chicken fettuccine Alfredo. Janet Loehrke, USA Today, 3 Oct. 2025 So when more children fall ill amid rising rates of outbreaks, fewer doctors will be available to care for them. Katherine J. Wu, The Atlantic, 3 Oct. 2025 Royal Caribbean International’s Serenade of the Seas cruise ship was hit with a norovirus outbreak that has sickened nearly 100 people. Ashley J. Dimella, FOXNews.com, 3 Oct. 2025 See All Example Sentences for outbreak

Word History

First Known Use

1562, in the meaning defined at sense 1a

Time Traveler
The first known use of outbreak was in 1562

Browse Nearby Words

Cite this Entry

“Outbreak.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/outbreak. Accessed 7 Oct. 2025.

Kids Definition

outbreak

noun
out·​break ˈau̇t-ˌbrāk How to pronounce outbreak (audio)
1
: a sudden increase in activity, use, or acceptance
the outbreak of war
2
: something (as an epidemic or revolution) that breaks out
an outbreak of measles

Medical Definition

outbreak

noun
out·​break ˈau̇t-ˌbrāk How to pronounce outbreak (audio)
1
: a sudden rise in the incidence of a disease
an outbreak of measles
2
: a sudden increase in numbers of a harmful organism and especially an insect within a particular area
an outbreak of locusts

More from Merriam-Webster on outbreak

Last Updated: - Updated example sentences
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