1.
to examine sth closely :
Your ankle's swollen—I think the doctor ought to look at it.
I haven't had time to look at (= read) the papers yet.
2.
to think about, consider or study sth :
The implications of the new law will need to be looked at.
3.
to view or consider sth in a particular way :
Looked at from that point of view, his decision is easier to understand.