[countable, usually singular] an action that you take when you know there is a risk but when you hope that the result will be a success赌博；打赌；冒险◆They took a gamble on the yen going up in value.他们打赌日元将会升值。◆Entering the sports car market was a huge gamble for us, but it paid off (= was successful).我们进入跑车市场冒了巨大的风险，但这一冒险获得了成功。