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
Avian flu added to the more recent spike in egg prices.
—
Scott Horsley, NPR, 19 Sep. 2025
Similar to the flu vaccine, the COVID-19 vaccines are updated annually to provide better protection against the strains of the virus circulating during each year's respiratory virus season.
—Anna Kleiber, jsonline.com, 19 Sep. 2025
Symptoms vary among people but can include fever, flu-like symptoms, headache, stiff neck, confusion and loss of balance.
—Matthew Robinson, MSNBC Newsweek, 19 Sep. 2025
These include Moderna, which HHS recently stripped of more than $700 million in grant funding for its pandemic-flu shots.
—Katherine J. Wu, The Atlantic, 18 Sep. 2025
See All Example Sentences for flu
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Scott Horsley, NPR, 19 Sep. 2025
Similar to the flu vaccine, the COVID-19 vaccines are updated annually to provide better protection against the strains of the virus circulating during each year's respiratory virus season.
—Anna Kleiber, jsonline.com, 19 Sep. 2025
Symptoms vary among people but can include fever, flu-like symptoms, headache, stiff neck, confusion and loss of balance.
—Matthew Robinson, MSNBC Newsweek, 19 Sep. 2025
These include Moderna, which HHS recently stripped of more than $700 million in grant funding for its pandemic-flu shots.
—Katherine J. Wu, The Atlantic, 18 Sep. 2025
See All Example Sentences for flu
Cite this Entry
“Flu.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/flu. Accessed 20 Sep. 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
Love words? Need even more definitions?
Merriam-Webster unabridged
Share