noun
friend; companion; acquaintance
A somewhat formal noun for people one associates with as friends or acquaintances. Often suggests a circle of contacts rather than one close friend.
彼は海外にも多くの交友を持っている。
He has many friends and acquaintances overseas.
noun
friendship; companionship; social relations
Refers to friendship, companionship, or the state/range of one's social relationships. Very common in compounds and phrases such as 交友関係 and 交友を深める.
See also: 交遊
彼女は学生時代から交友関係が広い。
She has had a wide circle of friends since her student days.
二人は留学中に交友を深めた。
The two deepened their friendship while studying abroad.