Adjective

1. Open, honest; tending to disclose information; truthful.

   I will be up front with you: what you are asking may be costly and difficult.

Adverb

1. At the beginning; before anything begins.

   If we settle on the terms of the deal up front there will be much less arguing later.

2. At the front.

   If you don't have anything to do up front, help organize the boxes in back.