Fort Washington, military post during the Amer. Revolution, situated on the highest point of Manhattan isl., N.Y. city, N.Y., overlooking the Hudson R. opposite Fort Lee, N.J. It was a hastily built earthwork with no water supply within its walls and no fortifications able to withstand a strong attack. It was, however, strategically located, and its maintenance was a mark of Amer. prestige. When Gen. George Washington was retreating before the Br. general William Howe, in 1776, he left a garrison under Gen. Nathanael Greene at Fort Washington. In spite of Washingtons advice to abandon the fort, Greene chose to remain. Howe attacked and captured the fort on Nov. 16, 1776.