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 affected data include childhood immunization rates against diphtheria, tetanus, pertussis, polio, measles, mumps and rubella, hepatitis, chicken pox and flu; and rates for 13 year olds and expectant mothers.
—
Business Columnist,
Los Angeles Times,
3 July 2026
Viral flu and bacterial/viral lung infections were responsible for about 40,000 to 65,000 deaths per year during the period between 1900 and 1910, according to the CDC’s National Center for Health Statistics (NCHS).
—
Melissa Rudy,
FOXNews.com,
3 July 2026
Deaths from flu and pneumonia, meanwhile, rose to be the eighth-leading cause of death last year amid lower uptake of the flu shot.
—
Rachel Roubein,
Washington Post,
2 July 2026
Three Democratic lawmakers introduced an amendment to a must-pass annual defense funding and policy bill that would require the Pentagon to restore mandatory flu vaccinations for service members.
—
Steven Beynon,
ABC News,
1 July 2026
See All Example Sentences for flu
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Business Columnist,
Los Angeles Times,
3 July 2026
Viral flu and bacterial/viral lung infections were responsible for about 40,000 to 65,000 deaths per year during the period between 1900 and 1910, according to the CDC’s National Center for Health Statistics (NCHS).
—
Melissa Rudy,
FOXNews.com,
3 July 2026
Deaths from flu and pneumonia, meanwhile, rose to be the eighth-leading cause of death last year amid lower uptake of the flu shot.
—
Rachel Roubein,
Washington Post,
2 July 2026
Three Democratic lawmakers introduced an amendment to a must-pass annual defense funding and policy bill that would require the Pentagon to restore mandatory flu vaccinations for service members.
—
Steven Beynon,
ABC News,
1 July 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 4 Jul. 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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