くう

Noun

1. empty air; sky

警棒けいぼうそらをなぐりつけ、よろめいて体勢たいせいをたてなおしたガードマンは、自分じぶんかって突進とっしんしてくる金網かなあみづくりのクズカゴをた。
kēbōde sorao naguritsuke yoromeite taisēo tatenaoshita gādomanwa jibunni mukatte tosshin shite kuru kanāmizukurino kuzukagō mita.
The guard's truncheon hit air. Off balance, he regained his posture to see a metal-mesh rubbish bin flying towards him.
Noun

2. shunyata (the lack of an immutable intrinsic nature within any phenomenon); emptiness

Buddhism
Noun

3. air force

Abbreviation
Related to 空軍
Noun
na-Adjective

4. fruitlessness; meaninglessness

Noun
na-Adjective

5. void (one of the five elements)

Related to 五大
no-Adjective

6. empty (e.g. set)

Mathematics