This is the 2455th most frequent Japanese word.
主席
"主席" in Japanese means "chairperson" or "chief."
In this sentence, '主席' is used to indicate the role of a chairman or leader leading a formal setting.
彼は会議の主席として発言しました。
He spoke as the chairman of the meeting.
Here, '主席' refers to the honor of graduating as the top student.
彼女は主席で大学を卒業しました。
She graduated as the top student from the university.
In this context, '主席' is used to denote the chief guest or person presiding over an event.