noun
rooftop
Refers to the top surface of a building, often used in contexts like rooftop bars, gardens, or events.
そのホテルにはルーフトップバーがある。
That hotel has a rooftop bar.
ルーフトップでパーティーを開く。
We hold a party on the rooftop.
屋上 is the native Japanese word for rooftop, more common in everyday speech. ルーフトップ is a loanword often used in trendy or commercial contexts.
Borrowed from English 'rooftop'.