An area for washing one's hands and face; a washroom or sink area (can refer to a washbasin area in public places or homes).
美術館の入口近くに手洗い場がある。
There is a washbasin area near the entrance of the art museum.
料理の前に手洗い場でしっかり手を洗ってください。
Please wash your hands well at the sink before cooking.
学校の手洗い場は朝から行列ができていた。
There was a line at the school's washbasin area from the morning.
Toilet; lavatory (can be used to mean a restroom).
すみません、手洗い場はどこですか？
Excuse me, where is the restroom?
古い駅舎の手洗い場は狭くて不便だ。
The old station's toilets are cramped and inconvenient.