The phrase "former professor" refers to someone who used to be a professor or teacher at a college or university but is not currently in that role anymore. Full definition
Call former professors and peers from your college days. (cvtips.com)
Siegfried («Zig») Engelmann, senior author of Direct Instruction programs, is director of the National Institute for Direct Instruction and former professor of education at the University of Oregon. (mheducation.com)
David Diao is a Chinese American artist and former professor at Cooper Union, famous for his hard - edge and pop art works. (widewalls.ch)