undenominational

[ uhn-di-nom-uh-ney-shuh-nl ]

/ ˌʌn dɪˌnɒm əˈneɪ ʃə nl /

free from religious sects or denominationalism; not limited or belonging to any particular religious group or groups.

Origin of undenominational

First recorded in 1870–75; un-¹ + denominational

un·de·nom·i·na·tion·al·ly, adverb

Thus he is the father of the undenominational religious teaching which later formed the basis of the Cowper-Temple compromise.

Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 10 |Various
The same influence maimed as far as it could the undenominational colleges.

Irish History and the Irish Question |Goldwin Smith
The national system of primary education, designed originally in 1831 to be undenominational, has become rigidly denominational.

The Framework of Home Rule |Erskine Childers
This is the undertone of the great mass of undenominational Sunday-school hymnology.

The Way of Salvation in the Lutheran Church |G. H. Gerberding

Sunday school work had an undenominational aspect at its very beginning, early in the nineteenth century.

An American Religious Movement |Winfred Ernest Douglas