A person authorized to act on behalf of another; an agent, representative, deputy, or attorney acting in someone else's stead.
契約書には代理人の署名が必要だ。
The contract requires the signature of the agent/representative.
本人が出席できないため、代理人が会議に出た。
Because the person couldn't attend, a representative went to the meeting.
裁判で被告は代理人を立てて出廷した。
In court, the defendant appeared with an appointed representative.