Definition of transitionist in English:

transitionist

Pronunciation /tranˈzɪʃ(ə)nɪst/ /trɑːnˈzɪʃ(ə)nɪst/ /tranˈsɪʃ(ə)nɪst/

noun

  • A person who advocates or supports transition; specifically in the early 19th century (a derogatory name for) a member of the Tractarian movement (regarded as facilitating transition to the Roman Catholic Church).

adjective

  • Of, relating to, or characterized by transition or transitionists.

Origin

Early 19th century; earliest use found in The Times. From transition + -ist.