a sour liquid consisting of dilute and impure acetic acid, obtained by acetous fermentation from wine, cider, beer, ale, or the like

used as a condiment, preservative, etc.

Pharmacology . a solution of a medicinal substance in dilute acetic acid, or vinegar.

sour or irritable speech, manner, or countenance

a note of vinegar in his voice.

Informal . vigor; high spirits; vim.

adjective

acetic , acetous , acidulant , acidulous , vinegary

noun

alegar