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