Concerned with establishing or promoting unity among churches or religions.
[From Late Latin oecūmenicus, from Greek oikoumenikos, from (hē) oikoumenē (gē), (the) inhabited (world), feminine present passive participle of oikein, to inhabit, from oikos, house; see weik-1 in Indo-European roots.] ec'u·men'i·cal n., ec'u·men'i·cal·ism n., ec'u·men'i·cal·ly adv.