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
For almost a century, some important vaccines, including shots that protect against diphtheria, tetanus, hepatitis and the flu, have included aluminum salts, compounds that contain small amounts of aluminum.
—
NPR, 31 Oct. 2025
Tammy Ross said her son, Jarrod Lawrence, died in 2013 after falling ill with the flu, according to FOX affiliate WJW.
—Abigail Adams, PEOPLE, 30 Oct. 2025
Most respiratory viruses, including Covid-19, flu and RSV, act through the indirect pathway, Roberts said, while enterovirus strains – related to the viruses that cause hand, foot and mouth disease – can directly infect the heart muscle.
—Asuka Koda, CNN Money, 29 Oct. 2025
The clinics provide primary care services such as annual wellness checks, cold and flu treatment, vaccines, diabetes management, vaccinations and behavioral health services.
—Pat Maio, Oc Register, 28 Oct. 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.
NPR, 31 Oct. 2025
Tammy Ross said her son, Jarrod Lawrence, died in 2013 after falling ill with the flu, according to FOX affiliate WJW.
—Abigail Adams, PEOPLE, 30 Oct. 2025
Most respiratory viruses, including Covid-19, flu and RSV, act through the indirect pathway, Roberts said, while enterovirus strains – related to the viruses that cause hand, foot and mouth disease – can directly infect the heart muscle.
—Asuka Koda, CNN Money, 29 Oct. 2025
The clinics provide primary care services such as annual wellness checks, cold and flu treatment, vaccines, diabetes management, vaccinations and behavioral health services.
—Pat Maio, Oc Register, 28 Oct. 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 2 Nov. 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