未決みけつ Common Noun Noun English jmdict 1 nouns which may take the genitive case particle 'no'noun (common) (futsuumeishi) pending;undecided Antonym: 既決 (きけつ) 訴訟は未決である。 The lawsuit remains undecided. 2 nouns which may take the genitive case particle 'no'noun (common) (futsuumeishi) unconvicted;awaiting judgement Antonym: 既決 (きけつ)