expansionism
noun [ U ] politics, business disapproving uk/ɪkˈspæn.ʃən.ɪ.zəm/ us/ɪkˈspæn.ʃən.ɪ.zəm/
（领土的）扩张主义，扩张政策;（经营规模的）扩张（政策）
increasing the amount of land ruled by a country, or the business performed by a company
As a consequence of expansionism by some European countries, many ancient cultures have suffered. 由于一些欧洲国家奉行扩张主义，很多古代文化都蒙受了劫难。