1. 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 • Syn: washbasin, basin, washbowl, lavatory • Hypernyms: sink 2. furniture consisting of a table or stand to hold a basin and pitcher of water for washing: 'wash-hand stand' is a British term • Syn: wash-hand stand • Hypernyms: furniture, piece of furniture, article of furniture