a movement promoting union between religions (especially between Christian churches)
同义词：oecumenism
(Christianity) the doctrine of the ecumenical movement that promotes cooperation and better understanding among different religious denominations: aimed at universal Christian unity
同义词：ecumenicismecumenicalism
英汉双解大词典
ecumenism/ɪˈkjuːməˌnɪzəm/
1.
N-UNCOUNT（不可数名词） Ecumenism is the belief that the different Christian churches should be as united as possible, and can also be used to refer to actions based on this belief. (主张基督教大联合的)普世教会主义 [正式]