basin

a bowl-shaped vessel; usually used for holding food or liquids; "she mixed the dough in a large basin"

the quantity that a basin will hold; "a basinful of water"

a natural depression in the surface of the land often with a lake at the bottom of it; "the basin of the Great Salt Lake"

the entire geographical area drained by a river and its tributaries; an area characterized by all runoff being conveyed to the same outlet; "flood control in the Missouri basin"

a bathroom sink that is permanently installed and connected to a water supply and drainpipe; where you can wash your hands and face; "he ran some water in the basin and splashed it on his face"