正当せいとう Common I-adj Noun English jmdict 1 adjectival nouns or quasi-adjectives (keiyodoshi)noun (common) (futsuumeishi) just;justifiable;right;due;proper;equitable;reasonable;legitimate;legal;lawful 先生は彼女に正当な取り扱いをしなかった。 The teacher didn't do her justice.