くうぜんぜつご 空前絶後 LinksSentence search for 空前絶後Sentence search for くうぜんぜつごKanji details for 空, 前, 絶 and 後Edit in JMdict Noun, Noun which may take the genitive case particle 'no'1. (so marvelous or horrible that it may be) the first and probably the lastYojijukugo (four character compound) Discussions Log in to talk about this word.