friend

noun

1. a member of the Religious Society of Friends founded by George Fox (the Friends have never called themselves Quakers)
2. a person you know well and regard with affection and trust"he was my best friend at the university"
3. an associate who provides cooperation or assistance"he's a good ally in fight"
4. a person with whom you are acquainted"I have trouble remembering the names of all my acquaintances"
5. a person who backs a politician or a team etc."all their supporters came out for the game"