loyalist Syllabification: (loy·al·ist)Pronunciation: /ˈloiəlist/Translate loyalist | into Spanish Definition of loyalist noun a person who remains loyal to the established ruler or government, especially in the face of a revolt. (Loyalist) a colonist of the American revolutionary period who supported the British cause. (Loyalist) a supporter of union between Great Britain and Northern Ireland. Derivatives loyalismPronunciation: /-ˌlizəm/ noun loyalist in other Oxford dictionaries Definition of loyalist in the British & World English dictionary