A washbasin or washstand: a sink unit, usually with a faucet, used for washing one's face or hands.
朝、洗面台で顔を洗ってから朝ごはんを食べる。
In the morning I wash my face at the washbasin before having breakfast.
アパートの洗面台が古くて水はねしやすい。
The apartment's washbasin is old and splashes water easily.
洗面台の下に掃除用具をしまっておいてください。
Please store the cleaning supplies under the washbasin.