Professor

![The Ancient Greek philosopher Socrates was one of the earliest recorded professors.[5]](/uploads/202502/04/Socrates_Louvre4527.jpg)


A professor, informally often known as full professor, is the highest academic rank at universities and other post-secondary education and research institutions in most countries. Literally, professor derives from Latin as a "person who professes" being usually an expert in arts or sciences, a teacher of the highest rank. In some countries, the word professor is also used in titles of lower ranks such as associate professor and assistant professor.