Main entry: boyfriend, swain, young man, beau, fellow
Definition: a man who is the lover of a girl or young woman
Usage: if I'd known he was her boyfriend I wouldn't have asked
Main entry: chap, blighter, bloke, fella, feller, fellow, gent, lad, cuss
Definition: a boy or man
Usage: that chap is your host; there's a fellow at the door; he's a likable cuss; he's a good bloke
Main entry: colleague, confrere, fellow
Definition: a person who is member of one's class or profession
Usage: the surgeon consulted his colleagues; he sent e-mail to his fellow hackers
Main entry: companion, comrade, familiar, fellow, associate
Definition: a friend who is frequently in the company of another
Usage: drinking companions; comrades in arms
Main entry: fellow, buster, dude
Definition: an informal form of address for a man
Usage: Say, fellow, what are you doing?; Hey buster, what's up?
Main entry: fellow
Definition: a member of a learned society
Usage: he was elected a fellow of the American Physiological Association
Definition: one of a pair
Usage: he lost the mate to his shoe; one eye was blue but its fellow was brown