A college is a place where students study after they have left school.
Computer Studies is one of the courses offered at the local technical college.
She got a diploma from the Royal College of Music.
You use college immediately after a preposition when you are talking about someone's attendance at a college. For example, you say that someone is at college.
He hardly knew Andrew at college.
He says you need the money for college.
What do you plan to do after college?
In American English, you usually say that someone is in college, not ‘at college’.
➜ See school - university