(英格兰、威尔士和北爱尔兰由议员选举产生的)镇长,市长,郡长 (in England, Wales and Northern Ireland) the head of a town, borough or county council, chosen by other members of the council to represent them at official ceremonies, etc.
the Lord Mayor of London 伦敦市长
(民选的)市长,镇长 the head of the government of a town or city, etc., elected by the public
市长 The mayor of a town or city is the person who has been elected to represent it for a fixed period of time or, in some places, to run its government.