1. 彻底清理(橱柜、房间、容器等);把…打扫干净
If you clean out something such as a cupboard, room, or container, you take everything out of it and clean the inside of it thoroughly.

2. 把…抢光;把…洗劫一空
If someone cleans you out, they take all the money and valuables you have. If they clean out a place, they take everything of value that is in it.

1. empty completely

e.g. We cleaned out all the drawers

Synonym: clear out

2. deprive completely of money or goods

e.g. The robbers cleaned us out in a couple of hours

3. force out

e.g. The new boss cleaned out the lazy workers