アドバルーン

noun

advertising balloon

A large balloon, often tethered, used for outdoor advertising. Wasei-eigo from 'ad balloon'.

wasei-eigo (Japanese-coined English), from ad balloon

• デパートの開かい店てんセールで、大おおきなアドバルーンが空そらに浮うかんでいた。

  At the department store's opening sale, a large advertising balloon was floating in the sky.