1. A sour liquid containing acetic acid, produced by fermenting a solution (such as wine or fermented rice) containing ethanol produced by a previous fermentation, used as a condiment and preservative.
2. Sourness of speech or mood; ill temper.
3. Liveliness and enthusiasm; vim.
[Middle English vinegre, from Old French vinaigre : vin, wine (from Latin vīnum) + aigre, sour (from Vulgar Latin *acrus, from Latin ācer; see ak- in the Appendix of Indo-European roots).]
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