Rooftop, Housetop
noun
Above the roof is the rooftop. What else would be up there?
おくじょう
This is a jukugo word that uses the on'yomi readings of the kanji. You didn't learn this reading for 屋 though, so here's a mnemonic to help you: One place in the world has more rooftops than any where else, and that's Oklahoma (おく). They get so many tornadoes that they need extra rooftops for when the first few blow off.
今日、屋上でバーベキューをします。
We're doing a rooftop barbecue today.
このビルの屋上ではトマトを育てています。
We grow tomatoes on the rooftop of this building.
屋上では、昼は洗濯物を干したり、夜は星を見たりするんです。
On the rooftop, we dry our laundry during the day and see the stars at night.