un. | 1. country in southeastern Europe. Formerly a constituent republic of Yugoslavia, it became independent in 1991. 2. mountainous region of northeastern Greece. 3. district in southwestern Bulgaria. 4. ancient kingdom in northern Greece, centralized under Philip II, who, with his son, Alexander the Great, created a vast empire in the 4th century 1. country in southeastern Europe. Formerly a constituent republic of Yugoslavia, it became independent in 1991. 2. mountainous region of northeastern Greece. 3. district in southwestern Bulgaria. 4. ancient kingdom in northern Greece, centralized under Philip II, who, with his son, Alexander the Great, created a vast empire in the 4th century |