A large basin or bowl in which to wash the hands and face.(noun)
The Century Dictionary (Public Domain)
Use "wash-basin" in a sentence
"Under the circumstances, with my wife and babies and a couple of lodgers suffering from the too great spaciousness of one room, taking a bath in a tin wash-basin would be an unfeasible undertaking."
"One wash-basin to share between two men. there is a boiler in the washroom and a big tub for hot baths was promised."
"Here is what Ekateryna stated about this design: The idea is that the wash-basin is manufactured from sheet material, corian or metal."