multiethnic adjective 1noun 1forms 3 adjective1 •Of, pertaining to, or consisting of several ethnic groups.In general, they are propagating the image of Ukrainians as the European descendants of good peasant stock, of multiethnic pioneers, and of an ancient multiethnic state. — 1993 noun1 •A member of more than one ethnic group. formsmultiethnics · more multiethnic · most multiethnic