決闘けっとう Noun Irregular Intransitive English jmdict 1 noun (common) (futsuumeishi) noun or participle which takes the aux. verb suru intransitive verb duel;shoot-out 西園寺は決闘に勝つと思っていたのに負けた。 Kyouichi Saionji, who he supposed would win the duel, has lost.