From Longman Dictionary of Contemporary EnglishUnionistU‧nion‧ist /ˈjuːnjənɪst/ noun [countable] PPGa member of a political party that wants Northern Ireland to remain part of the United Kingdom —Unionism noun [uncountable]
Examples from the Corpus
Unionist• This was the most respectable strain of Unionist opposition to the coalition.• When Lloyd George became prime minister in December 1916 he was backed by the Unionists in a coalition government.• Even assaults on the Unionists over alleged cases of discrimination could rebound.• And, by rooting out abuses, they actually helped the interests of ordinary Trade Unionists. 