* School is a general term referring to an institution of primary or secondary education. This encompasses elementary schools, middle schools, and high schools (or their equivalents in different countries). The focus is on foundational education, teaching basic skills and knowledge in a range of subjects. Schools generally prepare students for further education at a higher level.
* University is an institution of tertiary education, offering higher education programs leading to bachelor's, master's, and doctoral degrees. Universities focus on specialized study in a chosen field and often involve independent research and advanced learning. They build upon the foundation laid in schools.
In short: Schools are where you learn the basics, universities are where you specialize and pursue advanced studies. A university is a *type* of educational institution, while "school" is a broader term encompassing many types.