professor
n. countablen. a teacher of the highest rank at a college or university.
n. a university teacher of the highest academic rank. In North American English, the term is often applied more broadly to any post-secondary educator.
The professor gives a lecture every Monday morning.
After years of research and publishing several books, she was finally promoted to full professor.
The visiting professor delivered a series of seminars on quantum mechanics that challenged the existing theories held by the department's senior faculty.
From Middle English professor, professour, from Anglo-Norman proffessur and its etymon Latin professor (“declarer, person who claims knowledge”), from the past participle stem of profiteor (“profess”). By surface analysis, profess + -or.
Often used as a title before a surname, such as Professor Smith.
He is a professor in a high school.He is a teacher in a high school.In English, 'professor' is reserved for university-level educators; 'teacher' is used for primary and secondary schools.