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
Worthy of your time: The Ohio Department of Health's website has tips for preventing the flu and a list of vaccine locations.
—
Troy Smith, Axios, 28 Jan. 2025
Caldwell gave birth to Conor Scott a week earlier while dealing with the flu.
—Doug Feinberg, Chicago Tribune, 27 Jan. 2025
Just like regular flu, there are several strains of the avian flu circulating, but the most common is the H5N1 strain.
—Stephen Underwood, Hartford Courant, 24 Jan. 2025
Poultry Cases Bird flu continues to spread among commercial and backyard poultry.
—Meghan Bartels, Scientific American, 23 Jan. 2025
See all Example Sentences for flu 
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Troy Smith, Axios, 28 Jan. 2025
Caldwell gave birth to Conor Scott a week earlier while dealing with the flu.
—Doug Feinberg, Chicago Tribune, 27 Jan. 2025
Just like regular flu, there are several strains of the avian flu circulating, but the most common is the H5N1 strain.
—Stephen Underwood, Hartford Courant, 24 Jan. 2025
Poultry Cases Bird flu continues to spread among commercial and backyard poultry.
—Meghan Bartels, Scientific American, 23 Jan. 2025
See all Example Sentences for flu
Dictionary Entries Near flu
Cite this Entry
“Flu.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/flu. Accessed 8 Feb. 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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