Do·min·i·can¹ / dəˈminikən/ • n. a member of the Roman Catholic order of preaching friars founded by St. Dominic, or of a religious order for women founded on similar principles.• adj. of or relating to St. Dominic or the Dominicans.Do·min·i·can² • adj. of or relating to the Dominican Republic or its people.• n. a native or national of the Dominican Republic.Do·min·i·can³ • adj. of or relating to the island of Dominica or its people.• n. a native or national of the island of Dominica.

Dominican pert. to the Order of Friars Preachers (Black Friars). XVII. — medL. Dominicānus, f. Dominicus, L. form of the name of Domingo de Guzman (St. Dominic), c. 1170–1221, founder of an order of preaching friars; see -AN.