hill in Boston, Mass.: in a battle (1775) of the American Revolution, colonial forces besieging Boston were dislodged by British troops, but the victory failed to break the siege
See Bunker Hill in American Heritage Dictionary 4
(bŭngˈkər)
A low elevation, 32.6 m (107 ft) high, in Charlestown, a section of Boston, Massachusetts. The first major Revolutionary War battle was named for this hill, though the actual fighting took place on nearby Breed's Hill on June 17, 1775.