Толковый словарь английского языка Oxford English Reference - unionist

n. 1 a a member of a trade union. b an advocate of trade unions. 2 (usu. Unionist) an advocate of union, esp.: a a person opposed to the rupture of the parliamentary union between Great Britain and Northern Ireland (formerly between Great Britain and Ireland). b hist. a person who opposed secession during the American Civil War. Derivatives unionism n. unionistic adj.