flu-

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Definitions from WordNet

Noun flu- has 1 sense

influenza, flu, grippe - an acute febrile highly contagious viral disease
--₁ is a kind of contagious disease, contagion; respiratory disease, respiratory illness, respiratory disorder
--₁ has particulars: Asian influenza, Asiatic flu; swine influenza, swine flu

Definitions from the Web

Flu

Noun:

1. A highly contagious viral infection caused by influenza viruses that primarily affects the respiratory system, characterized by symptoms such as fever, cough, sore throat, runny nose, muscle aches, and fatigue. It can lead to severe complications and sometimes even death.

Example sentence:

I couldn't go to work because I caught the flu and needed to rest and recover.

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Flu mask

Noun:

2. A colloquial term for influenza, used informally to refer to the illness or the influenza vaccine.

Example sentence:

Make sure you get your flu shot this year to protect yourself from the flu.

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Flu vaccine