अंग्रेजी अंग्रेजी शब्दकोश

A sour liquid used as a condiment, or as a preservative, and obtained by the spontaneous (acetous) fermentation, or by the artificial oxidation, of wine, cider, beer, or the like.

Hence, anything sour; -- used also metaphorically.

To convert into vinegar; to make like vinegar; to render sour or sharp.