Shenandoah Syllabification: (Shen·an·do·ah)Pronunciation: /ˌSHenənˈdōə/Definition of Shenandoah a river in Virginia. Rising in two headstreams, one on each side of the Blue Ridge Mountains, it flows about 150 miles (240 km) north to join the Potomac River at Harpers Ferry. Shenandoah in other Oxford dictionaries Definition of Shenandoah in the British & World English dictionary