islandist adjective 1noun 1forms 3 adjective1 •Pertaining to or characteristic of islandism.Islandist assumptions remained dominant as late as 1911, when the third Home Rule Bill was drawn up. — 1986 noun1 •An islander, especially one with islandist attitudes.We find that the French islandists have in some instances grossly ill used Americans. — 1795 formsislandists · more islandist · most islandist