unionist Definition

1. An advocate or supporter of unionism, especially as a system of social or political organization.
2. A supporter of the federal union of the United States, especially at the time of the American Civil War.

Form: Unionist
3a. Before 1920: a supporter of the Union of all Ireland and Great Britain;

Form: Unionist (sometimes)
3b. Since 1920: a supporter of the union of Great Britain and Northern Ireland.

Form: Unionist (sometimes)
4. A supporter of the continued political union between Scotland, England and Wales.
5. An advocate or supporter of trade unions; a trade-unionist.

1. Relating to unionists or to unionism. See also Loyalist.

Form: Unionist (sometimes)