College generally refers to an institution of higher education that awards degrees and diplomas.
In the United States, college is often used interchangeably with "university", though some universities contain multiple colleges.
The term "college" can also mean:
1. A constituent part of a university (e.g. Harvard College within Harvard University)
2. A professional association (e.g. College of Physicians)
3. In British English, often refers to secondary education institutions