Definition of reunionist in US English:

reunionist

noun

  • A supporter or advocate of reunion between disunited factions, nations, etc.; especially (also with capital initial) an advocate of the reunion of Protestants (especially Anglicans) with the Roman Catholic Church.

adjective

  • Advocating or supporting reunion, especially that of Protestants with the Roman Catholic Church.

Origin

Early 19th century. From reunion + -ist. Compare reunionism.

Pronunciation

reunionist

/(ˌ)rɪːˈjuːnɪənɪst/