a permanently installed sink, fitted with a water supply and a drain, in which one may wash one's hands and face
A washbasin is a large bowl, usually with taps for hot and cold water, for washing your hands and face. = basin, sink. a container like a small sink used for washing your hands and face
a bathroom or lavatory sink that is permanently installed and connected to a water supply and drainpipe; where you wash your hands and face; "he ran some water in the basin and splashed it on his face"
a basin for washing the hands (`wash-hand basin' is a British expression) a bathroom or lavatory sink that is permanently installed and connected to a water supply and drainpipe; where you wash your hands and face; "he ran some water in the basin and splashed it on his face