Ojogbon jé ipò èkó tí o ga jù ní yunifásitì tàbí ilé-èkó miran , àwon ojogbon ma ún jé oloye gíga/pupo ní aaye èkó won , kí ènìyàn tó Le di ojogbon, o gbodo kókó keko láti di Dokita tí ìmòye(PhD) "Definition of PROFESSOR". Merriam-Webster. 2022-02-13. Retrieved 2022-03-02.  "professor". Etymology, origin and meaning of professor by etymonline. Retrieved 2022-03-02.  "What is a Professor? : Professors and professorship: origins and history". Professors and professorship. Retrieved 2022-03-02.