Added 10 October 2026 secessionist noun Categories: PeopleRare Words noun ! Definition from Wiktionary (CC BY-SA). More about secessionist at Wordnik → Where our words come from → A person who secedes or supports secession from a political union or an alliance or organisation. Gustav Klimt was of the Viennese secessionist school. adjective Seceding or supporting secession. Related Words: secessionsplittistseparatismseparatistdivisiondivisivenessdividedivisivesplitseparaterebelseparation Back to today's word