territorialist Definition
an advocate or supporter of territorialism, which is the belief that people who share a common language, culture, or ethnicity should form a sovereign state or territory.
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Summary: territorialist in Brief
A 'territorialist' [ter-i-tawr-ee-uh-list] is someone who supports territorialism, the idea that people who share a common language, culture, or ethnicity should form a sovereign state or territory.