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
After shaking off the flu, Arenas didn’t make his first bucket until almost midway through the second half.
—
Ryan Kartje, Los Angeles Times, 22 Feb. 2026
But as with the dismantling of huge swaths of our research capacity, the original refusal to even consider this mRNA flu vaccine on what are obviously ideological grounds shows future potential for the FDA to affect a hell of a lot more people than just the cranks who agree with them.
—The Orlando Sentinel, 21 Feb. 2026
However, adults 65 years and older and children younger than two are at higher risk of developing complications from the flu.
—Koko Nakajima, CNN Money, 20 Feb. 2026
The Food and Drug Administration will consider whether to approve Moderna's new flu vaccine after all, resolving a dispute that had blocked the company's application for the first-of-its-kind shot.
—Arkansas Online, 19 Feb. 2026
See All Example Sentences for flu
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Ryan Kartje, Los Angeles Times, 22 Feb. 2026
But as with the dismantling of huge swaths of our research capacity, the original refusal to even consider this mRNA flu vaccine on what are obviously ideological grounds shows future potential for the FDA to affect a hell of a lot more people than just the cranks who agree with them.
—The Orlando Sentinel, 21 Feb. 2026
However, adults 65 years and older and children younger than two are at higher risk of developing complications from the flu.
—Koko Nakajima, CNN Money, 20 Feb. 2026
The Food and Drug Administration will consider whether to approve Moderna's new flu vaccine after all, resolving a dispute that had blocked the company's application for the first-of-its-kind shot.
—Arkansas Online, 19 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 24 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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