A delegate is a person who is chosen to vote or make decisions on behalf of a group of other people, especially at a conference or a meeting.
VERB
授(权);把(职责、责任等)委托(给)
If you delegate duties, responsibilities, or power to someone, you give them those duties, those responsibilities, or that power so that they can act on your behalf.
If you are delegated to do something, you are given the duty of acting on someone else's behalf by making decisions, voting, or doing some particular work.