Meaning of “fellow” - Learner’s Dictionary

fellow

noun [ C ] uk us /ˈfeləʊ/
MAN old-fashioned

a man:

a big fellow with broad shoulders
COLLEGE

someone whose job is to teach or study a particular subject at some colleges or universities:

She's a research fellow at St Peter's college.
MEMBER

(Definition of “fellow noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)