第だい四よん階かい級きゅうMeaningsNoun1. the fourth estate; the proletariatKanji used第ordinal number四four階floor (of a building)級classPitch accentだいよんかいきゅうComposed of第だいprefix for forming ordinal numbersPrefix四よんfour; 4Numeric階かい級きゅう(social) class; rank; gradeNoun