a. and sb. (UN-1 7 and 12.)
adj. 1847. Webster (citing Buckham).
1854. Edin. Rev., Oct., 413. Their devotion to the one God and his Prophet [is] unsectarian in its character.
1887. Ruskin, Præterita, II. 195. A standard of the purest unsectarian Christianity.
sb. 1888. Pall Mall G., 20 Nov., 4/1. In Sheffield the victory was with the Unsectarians, in Manchester it was with the Sectarians.