1. 勇敢的；无畏的
    Someone who is brave is willing to do things which are dangerous, and does not show fear in difficult or dangerous situations.

    e.g. He was not brave enough to report the loss of the documents.
           他没有勇气报告丢失了文件。
    e.g. ...images of brave people risking their lives to aid others.
           冒着生命危险去帮助他人的勇士们的形象

2. （通常为达到某目标）勇敢面对
    If you brave unpleasant or dangerous conditions, you deliberately expose yourself to them, usually in order to achieve something.

    e.g. Thousands have braved icy rain to demonstrate their support.
           数千人在寒冷的天气中冒雨赶来以示他们的支持。

3. （尤指善于作战的）印第安勇士
    A brave is a young Native American man, especially one who is good at fighting.

4. 装作高兴；强作欢颜
    If someone is putting on a brave face or is putting a brave face on a difficult situation, they are pretending that they are happy or satisfied when they are not.

brave的意思

    e.g. He felt disappointed but he tried to put on a brave face...
           他感到很失望，但还竭力强装欢笑。
    e.g. The White House tried to put a brave face on the job figures.
           白宫面对就业数字强颜欢笑。