Here you can find general definitions of terms that you might want to know in this context.
A university is an institution of higher education and research, which grants academic degrees in a variety of subjects. A university provides both undergraduate education and postgraduate education.
Undergraduate education is an education level taken prior to gaining a first degree (except for an associate’s degree). Hence, in many subjects in many educational systems, undergraduate education is post-secondary education up to the level of a bachelor’s degree, such as in the United States, where a university entry level is known as undergraduate while students of higher degrees are known as graduates.