(countable) Any agent, natural or artificial that acts to preserve, especially when added to food.
‘Salt, sugar, and acid all act as preservatives when making pickles.’;
(uncountable) A sour liquid formed by the fermentation of alcohol used as a condiment or preservative; a dilute solution of acetic acid.
Tending to preserve.
‘The curators took preservative actions to maintain the ancient collection.’;
(countable) Any variety of vinegar.
‘a range of herb-flavoured vinegars’;
Having the power or quality of preserving; tending to preserve, or to keep from injury, decay, etc.
(transitive) To season or otherwise treat with vinegar.
That which preserves, or has the power of preserving; a presevative agent.
‘To wear tablets as preservatives against the plague.’;
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.
a chemical compound that is added to protect against decay or decomposition
Hence, anything sour; - used also metaphorically.
‘Here's the challenge: . . . I warrant there's vinegar and pepper in't.’;
tending or having the power to preserve;
‘the timbers should be treated with a preservative’;
To convert into vinegar; to make like vinegar; to render sour or sharp.
‘Hoping that he hath vinegared his sensesAs he was bid.’;
sour-tasting liquid produced usually by oxidation of the alcohol in wine or cider and used as a condiment or food preservative
dilute acetic acid
Vinegar is an aqueous solution of acetic acid and trace compounds that may include flavorings. Vinegar typically contains 5–8% acetic acid by volume.