flu
/fluː/
Proposed by a contributor, not yet supported by evidence.
Also seen as: flus
Sense 1
Meaning · English
Influenza.
Noun
Examples
catch flu
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Sense 2
Meaning · English
Stomach flu.
NounRegister: informal
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Common questions
What does “flu” mean?
Influenza.
Is “flu” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.