What is College ?
College is (noun) 1. a teaching institution for adults and young people She’s going on holiday with some friends from college. He’s studying accountancy at the local college. The college library has over 20,000 volumes. 2. US a teaching institution for adolescents and adults, which grants degrees at BA level (NOTE: The British term is university.) 3. a group of people who run a certain profession He’s a member of the Royal College of Pharmacists.
source: Easier English, Student Dictionary Upper Intermediate Level