Flu definitions

flo͝o
noun
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Any of various respiratory or intestinal infections caused by a virus.
noun
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Influenza.
noun
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Any of several infections that affect the respiratory or gastrointestinal tract and are caused by viruses other than the influenza virus.
noun
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Influenza.
noun
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noun
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(informal) Common cold.
noun
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(UK) Dated form of flu.
noun
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Origin of flu

Abbreviation of influenza.