A person whom one knows, likes, and trusts, A person with whom one is allied in a struggle or cause; a comrade, One who is attached to another by feelings of personal regard and preference; one who entertains for another sentiments which lead him to seek his company and to study to promote his welfare, verb_ transitive, obsolete To act as a friend to, to befriend; to be friendly to, to help, transitive To add (a person) to a list of friends on a social networking site; to officially designate (someone) as a friend