a specific variety of influenza, usually named for its point of dissemination or its animal vector: Hong Kong flu; swine flu.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use flu in a sentence
We can look back at flu pandemics — you usually have one or two years of circulation before enough immunity builds up to the virus.How coronavirus variants may drive reinfection and shape vaccination efforts | Erin Garcia de Jesus | February 5, 2021 | Science News
Depending on the answer, the US may require regular vaccine campaigns against the coronavirus in the future, similar to the flu.
Because mRNA is an information molecule, the difference between our covid vaccine, Zika vaccine, and flu vaccine is only the order of the nucleotides.The next act for messenger RNA could be bigger than covid vaccines | David Rotman | February 5, 2021 | MIT Technology Review
After all, most people who get sick with the flu won’t even bother to go get tested for it.
It could be because these viruses, unlike flu and RSV, aren’t as thoroughly destroyed by handwashing and using sanitizers.COVID-19 precautions may be reducing cases of flu and other respiratory infections | Jennifer Welsh | February 2, 2021 | Science News
I am fortunate that I have never been deathly ill, but whenever I have the stomach flu, I most certainly feel like I am dying.
The Italian health ministry said it could not prove a direct correlation between the flu vaccine and the deaths.
The benefits are obvious, says 83-year-old Mariacristina Poggio, who sums it up succinctly: “I could die from the flu without it.”
Blister rust is like having the flu; the pine beetle is like fast acting leukemia.
Suffering from flu symptoms one day, she decided to call in sick.
Mr. Pope was a bachelor, and his valet inconsiderately took the “flu.”Fifty Years of Railway Life in England, Scotland and Ireland | Joseph Tatlow
This condition caused many "flu" patients to develop pneumonia and to die.Hallowed Heritage: The Life of Virginia | Dorothy M. Torpey
Grisel explained that it was pneumonia following on "flu," and he heard her blow her poor little nose.Happy House | Betsey Riddle, Freifrau von Hutten zum Stolzenberg
I wish some of those fellows with the flu could have you to look after them.Quin | Alice Hegan Rice
Lee all but died, and Nielsen, afterward, told me he would rather die than have the "flu" again.Tales of lonely trails | Zane Grey
British Dictionary definitions for flu
the flu short for influenza
any of various viral infections, esp a respiratory or intestinal infection
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for flu
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.