定语从句先行词判断问题

清末民初，“大同”又被用来指称西方传来的社会主义、共产主义、世界主义等定义。In the late Qing Dynasty and the early Republic of China, this term referred to the concepts of socialism, communism,or cosplaymopolitanism that had been introduced to China from the West.请问这里，最后的定语从句先行词怎么分辨，理解成cosplaymopolitanism好像也可以？

定语从句修饰先行词，关系代词that指代先行词，并在从句中作主语作主语，谓语为从西方引进，由此可知the concepts of socialism, communism,or cosplaymopolitanism这个名词词组是先行词，而不是cosplaymopolitanism这一个词。不可以脱离逻辑判断。