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
Scientists estimate somewhere between 5%-35% of people do not get sick from the flu despite being exposed to the virus that causes it.
—
Juana Summers, NPR, 3 Apr. 2026
Dearth said Crew came down with the flu last year, but his symptoms didn't seem to be getting better with time.
—ABC News, 3 Apr. 2026
Becerra pointed to his experiences leading the sprawling federal health agency during the Biden administration, including dealing with the COVID-19 pandemic, the wildfires that devastated Maui, Hawaii, avian flu and mpox, formerly known as monkeypox.
—Seema Mehta, Los Angeles Times, 2 Apr. 2026
Preventive care includes a wide range of services, from diabetes and cancer screenings to vaccines that reduce the risk of conditions such as pneumonia, hepatitis and the flu.
—NBC news, 1 Apr. 2026
See All Example Sentences for flu
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Juana Summers, NPR, 3 Apr. 2026
Dearth said Crew came down with the flu last year, but his symptoms didn't seem to be getting better with time.
—ABC News, 3 Apr. 2026
Becerra pointed to his experiences leading the sprawling federal health agency during the Biden administration, including dealing with the COVID-19 pandemic, the wildfires that devastated Maui, Hawaii, avian flu and mpox, formerly known as monkeypox.
—Seema Mehta, Los Angeles Times, 2 Apr. 2026
Preventive care includes a wide range of services, from diabetes and cancer screenings to vaccines that reduce the risk of conditions such as pneumonia, hepatitis and the flu.
—NBC news, 1 Apr. 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 5 Apr. 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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