to give money as a payment for something

How much did you spend? 你花了多少钱？

I don't know how I managed to spend so much in the club last night. 我不知道昨晚在俱乐部怎么会花了这么多钱。

We spent a fortune when we were in New York. 我们在纽约花了一大笔钱。

She spends a lot of money on clothes. 她在衣服上花销很大。

We've just spent $1.9 million on improving our computer network. 我们刚花了190万美元改进我们的计算机网络系统。

We went on a spending spree (= we bought a lot of things) on Saturday. 我们周六疯狂购物了一番。

to use time doing something or being somewhere

I think we need to spend more time together. 我认为我们应该多花些时间在一起。

I spent a lot of time cleaning that room. 我花了很长时间打扫那个房间。

I've spent years building up my collection. 我花了好多年时间搜集藏品。

I spent an hour at the station waiting for the train. 我在火车站等车等了一个小时。

How long do you spend on your homework? 你做家庭作业用多长时间？

My sister always spends ages in the bathroom. 我姐姐总是花很长的时间梳洗打扮。

We spent the weekend in Buenos Aires. 我们在布宜诺斯艾利斯度过了周末。

You can spend the night here if you like. 如果你愿意的话，可以在这里过夜。

to use energy, effort, force, etc., especially until there is no more left

For the past month he's been spending all his energy trying to find a job. 过去的一个月里，他竭尽全力想找份工作。

They continued firing until all their ammunition was spent (= there was none of it left). 他们持续开火，直到弹药全部打光为止。

The hurricane will probably have spent most of its force (= most of its force will have gone) by the time it reaches the northern parts of the country. 飓风抵达该国北部地区时，风势可能已减弱了大半。

Her anger soon spent itself (= stopped). 她的怒气很快就烟消云散了。

spend a pennyidiom UK old-fashioned （礼貌用语）方便一下

spend the night togetheridiom (also spend the night with someone) 和（某人）一起过夜，和（某人）发生性关系

the amount of money that is spent on something

The total spend on the project was almost a million pounds. 这个项目的花费总计接近100万英镑。