I am not using such a definition. I am an American, and I am thinking of American places like Kenyon College, Hamilton College, Harvey Mudd College, Union College, Claremont College, etc., etc.

> Universities are composed of colleges in USA.

This is pretty rare terminology in the US, being mostly found in Ivy league or other old schools. Most "colleges" in the US are independent institutions.

https://studyusa.com/en/a/107/what-is-the-difference-between...