fellow fellow /ˈfɛloʊ/

noun

1. () A boy or man  ( blighter [Informal, British] , feller [Non-standard] , gent [Informal] , bloke [Informal, British] , chap [Informal, British] , cuss [Informal] , fella [Informal] , boyo [UK, Irish] , bucko [Informal] , fellow , lad [Informal] )
   a boy or man
    That chap is your host
   that chap is your host
    There's a fellow at the door
   there's a fellow at the door
    He's a likable cuss
   he's a likable cuss
    He's a good bloke
   he's a good bloke
   
2. () A friend who is frequently in the company of another  ( associate , familiar , yokefellow [ N. American] , companion , comrade , fellow )
   a friend who is frequently in the company of another
    Drinking companions
   drinking companions
    Comrades in arms
   comrades in arms
   
3. () A person who is member of one's class or profession  ( confrère , colleague , confrere , fellow )
   a person who is member of one's class or profession
    The surgeon consulted his colleagues
   the surgeon consulted his colleagues
    He sent e-mail to his fellow hackers
   he sent e-mail to his fellow hackers
   
4. A man who is the lover of a man or woman  ( boyfriend , fellow , swain [Archaic] , beau [Archaic] , boyf [Informal, British] )
   a man who is the lover of a man or woman
    If I'd known he was her boyfriend I wouldn't have asked
   if I'd known he was her boyfriend I wouldn't have asked
    When the law changed, Pet could finally married his long-time boyfriend Jim
   When the law changed, Pet could finally married his long-time boyfriend Jim
   
5. An informal form of address for a man  ( buster [Informal] , dude [Informal] , fellow , bo [Informal, American] , bruv [Informal, UK] )
   an informal form of address for a man
    Say, fellow, what are you doing?
   Say, fellow, what are you doing?
    Hey buster, what's up?
   Hey buster, what's up?
   
6. A member of a learned society  ( fellow )
   a member of a learned society
    He was elected a fellow of the American Physiological Association
   he was elected a fellow of the American Physiological Association
   
7. One of a pair  ( fellow , mate )
   one of a pair
    He lost the mate to his shoe
   he lost the mate to his shoe
    One eye was blue but its fellow was brown
   one eye was blue but its fellow was brown