朗文词典的解释：在英国，一天中的主餐叫 dinner，通常在晚上吃。有些人把这顿饭称为 supper，但也有些人认为 supper 是睡前吃的量很小的一餐。有些人把晚上的这顿主餐叫作 tea，但对其他人来说，tea 是下午吃的茶点。

In Britain, the main meal of the day is dinner and it is usually eaten in the evening. Some people call this meal supper, but to others supper is a very small meal that is eaten just before they go to bed. Some people call this main evening meal tea, but to others tea is a small meal that is eaten in the afternoon.