hot-air balloon
US /ˌhɑːt er bəˈluːn/
UK /ˌhɑːt er bəˈluːn/

1.
熱気球
an aircraft consisting of a large bag, called an envelope, which contains heated air, and a basket, called a gondola, suspended beneath it, used for carrying passengers or for sport
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They took a scenic ride in a hot-air balloon over the valley.
彼らは谷の上を熱気球で景色を楽しみながら乗った。
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The festival featured dozens of colorful hot-air balloons.
そのフェスティバルでは、数十のカラフルな熱気球が展示された。