高こう空くう

noun

high altitude; upper air

Refers to the sky or atmosphere at a great height; used in contexts like aviation, meteorology, or describing lofty views.

• 飛ひ行こう機きは高こう空くうを飛とんでいる。

  The airplane is flying at a high altitude.

• 高こう空くうの気き温おんは地ち上じょうよりずっと低ひくい。

  The temperature at high altitudes is much lower than on the ground.