separationist

US: (sep′ə rā′shə nist)

WordReference Random House Unabridged Dictionary of American English © 2025

sep•a•ra•tion•ist  (sep′ə rā′shə nist), n., adj. 

1. separatist.

• separation + -ist 1880–85

WordReference Random House Learner's Dictionary of American English © 2025

sep•a•ra•tist /ˈsɛpərətɪst, ˈsɛprə-/   n. [countable]

1. one who separates, as from a church.
2. one calling for formal separation, as of a part of a country from the rest of it.

adj. 

3. of or relating to separatists.

sep•a•ra•tism, n. [uncountable] See -pare¹-.

WordReference Random House Unabridged Dictionary of American English © 2025

sep•a•ra•tist  (sep′ər ə tist, -ə rā′-), n. 

1. a person who separates, withdraws, or secedes, as from an established church.
2. an advocate of separation, esp. ecclesiastical or political separation.

adj. 

3. of, pertaining to, or designating separatism or separatists:
   separatist forces; separatist tendencies.

• separate (adjective, adjectival) + -ist 1600–10

sep′a•ra•tism, n. 

Collins Concise English Dictionary © HarperCollins Publishers::

separatist / ˈsɛpərətɪst ˈsɛprə-/, separationist noun

1. a person who advocates or practises secession from an organization or group
2. (as modifier): a separatist movement

ˈseparaˌtism noun