"Universus" consists of "Unus" which means "one" and "Universus" which means "along a certain direction". The literal meaning of "universus" is the reason.
This is "in a specific direction". "Universum" is the neutral singular form of "Universus". When used as a noun, it refers to "the universe" and is also a derivative.
"Universitas" also refers to "a group of individuals and associations". In the Middle Ages, Latin was used in government, religion and education. The word "Universitas" has been used to refer to new alliances between teachers and students, such as universities in Salerno, Paris and Oxford. This kind of consortium is the embryonic form of today's university. Today, the word university can be traced back to Latin. The earliest record is around 1300, which was used to refer to this kind of consortium.
Earlier, Plato, a Greek philosopher, founded a "Academy" in 387 BC in Akkadmos near Athens to teach philosophy, mathematics and physical education, which was regarded by some as the pioneer of European universities.