(See also Friends.) A Quaker; a member of the Society of Friends.

(rock-climbing) Brand name of a spring-loaded camming device, now used to refer to any such device, often uncapitalized, as friend.

A person, typically someone other than a family member, spouse or lover, whose company one enjoys and towards whom one feels affection.

An associate who provides assistance.

A person with whom one is vaguely or indirectly acquainted.

A person who backs or supports something.

(informal) An object or idea that can be used for good.

(colloquial, ironic, used only in the vocative) Used as a form of address when warning someone.

(object-oriented programming) A function or class granted special access to the private and protected members of another class.

(climbing) A spring-loaded camming device.

(euphemistic) A lover; a boyfriend or girlfriend.

(in the plural, usually preceded by "and") Used to refer collectively to a group of associated individuals, especially those comprising a cast, company, or crew

(transitive) To add (a person) to a list of friends on a social networking site; to officially designate (someone) as a friend.