[f. as prec. + -ISM.] The character, manner or principles of an exclusionist; exclusivism.
1832. Chr. Observer., July, 486 (Worcester 1846). Sixtuss Index strengthens the exclusionism of the Trent code, by declaring that it does not allow bishops to grant licences to buy, read, or retain Bibles, or any parts or summaries of them, in the vernacular tongues.
1864. in Webster; hence in later Dicts.