fellow

noun

• 1 informal a man or boy:he was an extremely obliging fellow

• 2 (usually fellows) a person in the same position, involved in the same activity, or otherwise associated with another:he was learning with a rapidity unique among his fellows
• a thing of the same kind as or otherwise associated with another:the page has been torn away from its fellows

• 3a member of a learned society: a fellow of the Geological Society
• British an incorporated senior member of a college:a tutorial fellow
• (also research fellow) an elected graduate receiving a stipend for a period of research.
• a member of the governing body in some universities.

adjective

• sharing a particular activity, quality, or condition with someone or something:they urged the troops not to fire on their fellow citizens