A go-between; a matchmaker who acts as an intermediary (especially in arranging marriages).
両家の関係を取り持つために、古くからの友人を仲人に頼んだ。
To mediate between the two families, we asked an old friend to act as matchmaker.
昔は結婚の際に仲人を立てるのが一般的だった。
In the past it was common to appoint a matchmaker when marrying.
彼の友人が仲人になって、二人を引き合わせてくれた。
His friend acted as a matchmaker and introduced the two of them.