1The flat top surface of a building, used for things like hanging laundry, a resting area, a rooftop garden, or parking.
デパートの屋上には遊園地があった。
There was an amusement area on the department store's rooftop.
洗濯物はいつも屋上に干している。
I always hang the laundry out on the rooftop.
ビルの屋上から花火がよく見えた。
We could see the fireworks really well from the building's rooftop.
会社の屋上庭園で昼休みにお弁当を食べる人が多い。
Many people eat their lunch boxes in the company's rooftop garden during the lunch break.