secessionism noun. [sɪ'sɛʃ(ǝ)nɪz(ǝ)m] L19.
[from SECESSION + -ISM.]
The principles of those in favour of (a) secession, spec. (a) US History of Southern States from the US Union, (b) Scottish Ecclesiastical History of the Secession Church from the established Church of Scotland.

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