a bowl-shaped device with a seat that you sit on or stand near when emptying the body of urine or solid waste, or another device used for this purpose

I was on (= using) the toilet when the phone rang. 电话铃响时我正在上厕所。

Don't forget to flush the toilet. 别忘了冲马桶。

UK Excuse me, Miss Lewis, I need/want (to go to) the toilet. 对不起，刘易斯小姐，我要去一下洗手间。

The toilet seat was cracked and there was no paper. 马桶座圈裂了，卫生纸也没有了。

a room with a toilet in it

Someone's in the toilet. 卫生间里有人。

to empty the body of urine or solid waste, usually using a toilet to do so

It's going to be a long drive, kids, so if you want to go to the toilet, do so now. 孩子们，我们要作长途旅行，所以如果要上厕所现在就去。

a room or small building in a public place in which there are several toilets

Do you know where the ladies' toilets are? 你知道女厕所在哪儿吗？

the process of washing and dressing yourself

Virginia had spent longer than usual over her toilet that evening, with pleasing results. 那天晚上弗吉尼娅梳洗打扮的时间比平时要久，效果很好。