In the United States, a school is generally a place where students receive primary or secondary education. This can include elementary schools, middle schools, and high schools.

A college is a post-secondary institution that typically offers undergraduate programs leading to a bachelor's degree. Some colleges may also offer graduate programs leading to a master's or doctoral degree.

A university is a post-secondary institution that generally offers a wider range of academic programs and degrees, including both undergraduate and graduate programs. Universities often have a larger number of students and a more diverse range of academic departments and research facilities than colleges.

It's worth noting that these terms can be used somewhat interchangeably, and the exact definitions can vary somewhat from one region to another. In general, however, these are the typical definitions of these terms in the United States.