1 [U] a sweet substance that you get from certain plants 食糖；糖: Do you take sugar in tea? 你喝茶加糖吗？

2 [C] (in a cup of tea, coffee, etc) the amount of sugar that a small spoon can hold; a lump of sugar （放在茶、咖啡等之中）一茶匙糖，一块方糖

3 [C] any of various sweet substances that are found naturally in plants, fruit, etc （植物、水果等中天然存在的）糖: Glucose and fructose are sugars. 葡萄糖和果糖都是糖。