a teaching/research 'fellow' [=a graduate student who gets money in exchange for teaching/research]
He attended the concert with a 'fellow' student. [=someone who is a student, as he is]
He has always tried to be of service to 'his fellow man'. [=to other people]
(..) What? Dressed Iike this? No. I'm going to a baII. Good. Get in. MO TAZ/ Her Majesty, the Queen. CLARlSSE/ My fellow Genovians and honored guests... good evening. l apologize for the delay and--oh, hello-- And may l say... (..)2001 The Princess Diaries