1 highest in rank -- 最高级别的;首席的
the chief fire officer/accountant 消防局局长/首席会计师
2 the person in charge of a group or organization, or the ruler of a tribe -- 领导人;首领;头目;酋长
You must try to relax and not to worry - that's the chief thing.
The chief of police said that he was committed to wiping out vice in the city.
He was a Zulu chief.