(in some European countries but not the UK) a nobleman of high rank between a count and a duke （除英国外一些欧洲国家的）侯爵 - (also marquess)
(in the UK) a nobleman of high rank between an earl and a duke 侯爵夫人： （在英国）伯爵和公爵之间的贵族贵族
Word OriginMiddle English: from Old French marchis, reinforced by Old French marquis, both from the base of march ‘an area of land on the border between two countries or territories’.