N-COUNT (一心想跨入社会权贵阶层的)攀高结贵者,野心勃勃的人 You describe someone as an arriviste when you are criticizing them because they are trying very hard to belong to an influential or important social group which you feel they have no right to belong to. (一心想跨入社会权贵阶层的)攀高结贵者,野心勃勃的人 [formal, disapproval]