Definition of fellow
(noun)
a boy or man; "that
chap is your host"; "there's a fellow at the door"; "he's a
likable cuss"; "he's a
good bloke"
one of a pair; "he
lost the
mate to his shoe"; "one eye was
blue but its fellow was brown"
an
informal form of
address for a man; "Say, fellow, what are you doing?"; "Hey buster, what's up?"