Wine made from grapes; generally synonymous with 'wine'.
夕食には赤いぶどう酒を一本開けた。
We opened a bottle of red wine with dinner.
葡萄酒（ぶどう酒）の産地を訪れて試飲をした。
I visited a wine-producing region and did some tastings.
古いぶどう酒は保存方法によって風味が大きく変わる。
Old wine's flavor can vary greatly depending on how it's stored.