1. (noun)washbasin, basin, washbowl, washstand, lavatory a bathroomsink that is permanently installed and connected to a watersupply and drainpipe; where you can wash your hands and face "he ran some water in the basin and splashed it on his face"
2. (noun)washbasin, handbasin, washbowl, lavabo, wash-hand basin a basin for washing the hands (`wash-hand basin' is a British expression)