Dictionary/空域くういきKuuiki空域 (Kuuiki) is a Japanese noun meaning “airspace”.MeaningsnounairspaceKanji in 空域空empty域rangeRelated words開くto open (e.g. doors)空emptiness空sky開けるto open (a door, etc.)空くto become less crowded空気air地域area空港airport空間space空っぽempty夜空night sky空き巣empty nest