( n. )
A circular or oval valley, or depression of the surface of the ground, the lowest part of which is generally occupied by a lake, or traversed by a river.
( n. )
A circular or oval valley, or depression of the surface of the ground, the lowest part of which is generally occupied by a lake, or traversed by a river.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012