noun
a person with whom one is on good and, usually, familiar terms
he is one of my closest friends
Synonyms: acquaintance, amigo, cater-cousin, confidant, familiar, intimate, mate; compare associate 3
Related Word: alter ego, best friend, bosom friend; ally, colleague, partner; nodding acquaintance
Contrasted words: enemy; adversary, antagonist, opponent; competitor, rival
Antonyms: foe