1chiefly British a bowl for washing, typically attached to a wall and having taps connected to a water supply; a washbasin.
2a wide open container used for preparing food or for holding liquid:she poured water from the jug into the basin
3a circular or oval valley or natural depression on the earth’s surface, especially one containing water:the loch is cupped in a shallow basin among low hills
the tract of country drained by a river and its tributaries, or which drains into a lake or sea:the Amazon basin
an enclosed area of water where boats can be moored:the gravel pit is to be used as a yacht basin
Geology a circumscribed rock formation where the strata dip towards the centre.
