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
In other Group A play, Canada was scheduled to open the tournament facing Switzerland, which also had a stomach flu scare.
—
John Wawrow, Baltimore Sun, 7 Feb. 2026
More Effective Ways to Ease a Stomach Bug While there’s no quick cure for viral gastroenteritis, supportive care can make stomach flu symptoms more manageable and reduce the risk of complications like dehydration.
—Kathleen Ferraro, Verywell Health, 6 Feb. 2026
The agency has also been publishing fewer reports in its flagship publication the Morbidity and Mortality Weekly Report, canceled a campaign to encourage flu vaccination, paused updating critical databases and rarely briefs reporters.
—Rob Stein, NPR, 6 Feb. 2026
The patient, a 33-year-old Missouri resident whose name was not shared, was originally flown to Northwestern Memorial Hospital with lung failure linked to a flu infection in spring 2023.
—Melissa Rudy, FOXNews.com, 5 Feb. 2026
See All Example Sentences for flu
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John Wawrow, Baltimore Sun, 7 Feb. 2026
More Effective Ways to Ease a Stomach Bug While there’s no quick cure for viral gastroenteritis, supportive care can make stomach flu symptoms more manageable and reduce the risk of complications like dehydration.
—Kathleen Ferraro, Verywell Health, 6 Feb. 2026
The agency has also been publishing fewer reports in its flagship publication the Morbidity and Mortality Weekly Report, canceled a campaign to encourage flu vaccination, paused updating critical databases and rarely briefs reporters.
—Rob Stein, NPR, 6 Feb. 2026
The patient, a 33-year-old Missouri resident whose name was not shared, was originally flown to Northwestern Memorial Hospital with lung failure linked to a flu infection in spring 2023.
—Melissa Rudy, FOXNews.com, 5 Feb. 2026
See All Example Sentences for flu
Cite this Entry
“Flu.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/flu. Accessed 13 Feb. 2026.
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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