From Longman Dictionary of Contemporary Englishvinegarvin‧e‧gar /ˈvɪnɪɡə $ -ər/ ●●○ noun [uncountable] 
DFCa sour-tasting liquid made from malt or wine that is used to improve the taste of food or to preserve it
DFCa sour-tasting liquid made from malt or wine that is used to improve the taste of food or to preserve itExamples from the Corpus
vinegar• Then add the cranberries, salt, pepper and vinegar.• Then there is the heirloom tomato salad with baby spinach, a little white balsamic vinegar and feta cheese.• He decided on a brutal vinegar poultice.• Stir in vinegar and parsley just before serving.• Treacle sponge, £1.50, had custard but no vinegar.• The most effective deterrent, however, is that simple household substance, vinegar.• Forget the vinegar bottle, today there are pinches of salt. - Leicester University Press, £35.• To make vinaigrette, in a small bowl, whisk together vinegar, mustard, and basil.Origin vinegar (1200-1300) Old French vinaigre, from vin “wine” + aigre “sour” 