What does it mean for red wine that was not refrigerated to go bad?

Wine once opened has to fight spoilage promoted by oxygen. Refrigerating the wine helps to keep bacteria from spoiling the wine. Over a short period of time this bacteria will turn the wine to vinegar. However, keeping wine in the fridge will not save it forever just a few more days. Before drinking the red wine just take bottle out of fridge about twenty min before drinking.