ec·u·me·nism 
(ĕkyə-mə-nĭz′əm, ĭ-ky-)
(ĕkyə-mə-nĭz′əm, ĭ-ky-)n.
1. A movement promoting unity among Christian churches or denominations.
2. A movement promoting worldwide unity among religions through greater cooperation and improved understanding.
ec′u·menist n.