loyalistPronunciation: /ˈlɔɪəlɪst/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: Tory loyalists (Loyalist) a supporter of union between Great Britain and Northern Ireland. (Loyalist) a colonist of the American revolutionary period who supported the British cause. Derivatives loyalism noun loyalist in other Oxford dictionaries Definition of loyalist in the US English dictionary