washbasin
1. [ noun ] a bathroom or lavatory sink that is permanently installed and connected to a water supply and drainpipe; where you wash your hands and face
Synonyms: washbowl basin lavatory washstand
Examples:

"he ran some water in the basin and splashed it on his face"

Related terms: sink
2. [ noun ] a basin for washing the hands (`wash-hand basin' is a British expression)
Synonyms: washbowl lavabo wash-hand_basin handbasin
Related terms: basin bathroom UK