1 hack (away) (at) sth to cut sth in a rough way with a tool such as a large knife 砍；斩: He hacked at the branch of the tree until it fell. 他不断地砍，直到把树枝砍了下来。

2 (informal 非正式)hack (into) (sth) to use a computer to look at and/or change information that is stored on another computer without permission （在没有获得准许的情况下）利用计算机查看及╱或更改另一计算机内的数据；入侵他人计算机