General; universal; in ecclesiastical usage, that which concerns the whole church; as, an ecumenical council.
From a Greek word meaning worldwide. Any movement which attempts to bring together various denominations or traditions within a single religion. The term is used most commonly to refer to Christian intra-denominational efforts.
An adjective meaning "universal", derived from the Greek word oikoumene, "the inhabited world" or "the whole world". (Lynch, Joseph H. The Medieval Church: A Brief History, 362)