NOUN (2)

1. a channel in southeastern Virginia through which the Elizabeth River and the James River flow into Chesapeake Bay;

2. a naval battle of the American Civil War (1862); the indecisive battle between the Monitor and the Merrimac;

WordNet (r) 3.0 (2006):

Hampton Roads
    n 1: a channel in southeastern Virginia through which the
         Elizabeth River and the James River flow into Chesapeake
         Bay
    2: a naval battle of the American Civil War (1862); the
       indecisive battle between the Monitor and the Merrimac