the day of the week after Saturday and before Monday, when most people in Western countries do not go to work

We're going to visit my aunt and uncle on Sunday. 我们周日要去看望我的叔叔和婶婶。

They go to church on Sundays. 他们星期天去教堂。

The choir is giving a concert next Sunday. 合唱团下个星期天举行音乐会。

I haven't done any exercise since last Sunday. 上个星期天以来，我什么练习也没有做。

New Year's Day this year is a Sunday. 今年元旦是一个星期天。

Sunday morning/afternoon/evening/night 星期天上午／下午／傍晚／晚上

a traditional British Sunday lunch of roast beef and vegetables 一顿吃烤牛肉配蔬菜的传统英式礼拜日午餐