预付;提前支付
If you give someone an amount of money up front, you pay that person before they do something for you.
He wants all the money up front or he won't do the job. 他要求预付全款，否则他就不接这活儿。
They charge £2,500 up front, and then the remainder of the bill whent he work is completed.
You have to pay 50% of the fee up front.
The insurer requires 15% up front to start the cover.
If I were you, I'd be wary of any company that demands money up front.
We shouldn't have paid him all that money up front.
See also: front noun (PLACE)