flunoun [ U ]
uk/fluː/us/fluː/formal influenzaB1 a common infectious illness that causes fever and headache:
a flu virus
to catch/get/have (the) flu
More examples
- She's very hot and shivery, so I think she must have flu.
- There are lots of people off school this week with flu.
Thesaurus: synonyms and related words
Colds & flu
- bunged up
- chesty
- chill
- cold
- congested
- coughing fit
- frog
- hacking cough
- have a frog in your throat idiom
- head cold
- influenza
- runny
- sneeze
- sniff
- sniffle
- snuffle
- stuffed up
- swine flu
- the common cold
- tickle
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