Definition: a member of the Religious Society of Friends founded by George Fox (the Friends have never called themselves Quakers)
Main entry: acquaintance, friend
Definition: a person with whom you are acquainted
Usage: I have trouble remembering the names of all my acquaintances; we are friends of the family
Definition: an associate who provides cooperation or assistance
Usage: he's a good ally in fight
Main entry: friend
Definition: a person you know well and regard with affection and trust
Usage: he was my best friend at the university
Main entry: supporter, friend, admirer, protagonist, booster, champion
Definition: a person who backs a politician or a team etc.
Usage: all their supporters came out for the game; they are friends of the library