空くう対たい空くうMeaningsNo-adjective1. air-to-airKanji used空empty air対oppositeComposed of空くうempty air; sky; shunyata (the lack of an immutable intrinsic nature within any phenomenon); emptiness; air force; fruitlessness; meaninglessness; void (one of the five elements); empty (e.g. set)Noun対たい空くうanti-aircraft; antiaircraftPrenominal