防ぼう空くう気き球きゅう

noun

barrage balloon

A large tethered balloon used as a defense against low-flying aircraft, especially during World War II. Also referred to as 阻塞気球.

See also: 阻塞気球

• 第だい二に次じ世せ界かい大たい戦せん中ちゅう、ロンドン上じょう空くうには多おおくの防ぼう空くう気き球きゅうが浮うかんでいた。

  During World War II, many barrage balloons floated over London.