1
2
: any of several virus diseases marked especially by respiratory or intestinal symptoms
Examples of flu in a Sentence
He came down with a bad bout of the flu.
Recent Examples on the Web
Egg prices, which have been volatile after a bout of avian flu, fell 7.3%.
—
Christopher Rugaber, Fortune, 15 May 2024
Avian flu has been positively identified in 42 cattle herds across nine states, suggesting its spread has been somewhat limited.
—Susanne Rust, Los Angeles Times, 14 May 2024
See all Example Sentences for flu 
Christopher Rugaber, Fortune, 15 May 2024
Avian flu has been positively identified in 42 cattle herds across nine states, suggesting its spread has been somewhat limited.
—Susanne Rust, Los Angeles Times, 14 May 2024
See all Example Sentences for flu
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'flu.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
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Cite this Entry
“Flu.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/flu. Accessed 20 May. 2024.
Copy CitationKids Definition
flu
noun2
: any of several virus diseases that are something like a cold
flu-like
adjective
ˈflü-ˌlīk
Medical Definition
flu
noun1
2
: any of several chiefly viral illnesses marked especially by respiratory or gastrointestinal symptoms see intestinal flu
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