a. A person of equal rank, position, or background; a peer.
b. One of a pair; a mate: found the lost shoe and its fellow.
4. A member of a learned society.
5. A graduate student appointed to a position granting financial aid and providing for further study.
6. Chiefly British
a. An incorporated senior member of certain colleges and universities.
b. A member of the governing body of certain colleges and universities.
7. Obsolete A person of a lower social class.
Being of the same kind, group, occupation, society, or locality; having in common certain characteristics or interests: fellow workers.
[Middle English felau, from Old English folaga, from Old Norse flagi, business partner, fellow, from flag, partnership : f, property, money; see peku- in Indo-European roots + lag, a laying down; see legh- in Indo-European roots.]
Word History: A jolly good fellow might or might not be the ideal business associate, but the ancestor of our word fellow definitely referred to a business partner. Fellow was borrowed into English from Old Norse flagi, meaning a partner or shareholder of any kind. Old Norse flagi is derived from flag, partnership, a compound made up of f, livestock, property, money, and lag, a laying in order and fellowship. The notion of putting ones property together lies behind the senses of flagi meaning partner and consort. In Old Icelandic flagi also had the general sense fellow, mate, comrade, which fellow has as well, indicating perhaps that most partnerships turned out all right for speakers of Old Icelandic.
fellow /flo/ n.1 infrml. a man or boy: Charles is a friendly fellow.2 frml. (at a university) a person who receives an award of money and a position for advanced study: She is a fellow at Yale University. adj. referring to people with whom one has something in common: He lunches with some of his fellow workers (students, scientists, etc.) each day.