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
The Centers for Disease Control and Prevention (CDC) has ended its emergency response to the H5N1 avian flu.
—
Alejandra O’Connell-Domenech, The Hill, 8 July 2025
Others can experience chills, especially if the nausea is caused by a condition that also causes fever, like flu or food poisoning.2
4.
—Kelly Burch Published, Verywell Health, 7 July 2025
Some seemed not to take seriously the risk that infections like RSV and the flu can pose to even healthy children.
—Lisa Jarvis, Mercury News, 5 July 2025
Simple measures like handwashing and avoiding sick individuals are helpful, but not enough to stop the spread of flu.
—Austin American Statesman, 2 July 2025
See All Example Sentences for flu
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Alejandra O’Connell-Domenech, The Hill, 8 July 2025
Others can experience chills, especially if the nausea is caused by a condition that also causes fever, like flu or food poisoning.2
4.
—Kelly Burch Published, Verywell Health, 7 July 2025
Some seemed not to take seriously the risk that infections like RSV and the flu can pose to even healthy children.
—Lisa Jarvis, Mercury News, 5 July 2025
Simple measures like handwashing and avoiding sick individuals are helpful, but not enough to stop the spread of flu.
—Austin American Statesman, 2 July 2025
See All Example Sentences for flu
Cite this Entry
“Flu.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/flu. Accessed 20 Jul. 2025.
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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