fellow

1. A colleague or partner.
2. A companion; a comrade.
3. A man without good breeding or worth; an ignoble or mean man.
4. An equal in power, rank, character, etc.
5. One of a pair, or of two things used together or suited to each other; a mate.
6. A person with common characteristics, being of the same kind, or in the same group.

   Roger and his fellow workers are to go on strike.

7. A male person; a man.
8. A person; an individual, male or female.
9. A rank or title in the professional world, usually given as "Fellow".
10. (Aboriginal English) Used as a general intensifier

verb

To suit with; to pair with; to match.

1. A person who was a fellow attendee at one's school.

   I've lost touch with all my old schoolmates: I only see them at class reunions.