1A guest room in a hotel or a passenger cabin on a ship or plane; a room intended for guests or passengers.
ホテルの客室は海が見える部屋にしてもらった。
I had the hotel put me in a guest room with a sea view.
客室の設備は新しく、バスルームも広かった。
The guest room's facilities were new, and the bathroom was spacious.
飛行機の客室に荷物を置けるスペースが少なかった。
There was little space to store luggage in the airplane cabin.
2A drawing room or reception room used for guests; a formal room for entertaining visitors.
祖母の家の客室には古い家具が並んでいた。
Grandmother's drawing room was lined with antique furniture.
客が来たので客室でお茶を出した。
Guests arrived, so we served tea in the reception room.