She wants to go back to college. - Hun ønsker at gå tilbage til college.
If you go back to a task or activity, you start doing it again after you have stopped doing it for a period of time. I now look forward to going back to work as soon as possible Amy went back to studying
If you go back to a particular point in a lecture, discussion, or book, you start to discuss it. Let me just go back to the point I was making