CU professors expect you to cite your sources for research papers, projects, and assignments.
From Cedarville's Student Handbook: Academic Integrity Statement and Procedures:
"The Academic Integrity Pledge is a commitment to live with integrity in all areas of life including the classroom. All forms of academic dishonesty violate this pledge and could result in dismissal from this community."
Check the library's citation help page for additional resources.
This is not an exclusive list, but it should give you an idea of what plagiarism means.