むだん 無断 Common word JLPT N1 LinksSentence search for 無断Sentence search for むだんKanji details for 無 and 断Edit in JMdict Noun, Noun, used as a prefix1. absence of permission; lack of permissionNoun, Noun, used as a prefix2. absence of (advance) notice; lack of notice Discussions Log in to talk about this word.