後こう期き高こう齢れい者しゃMeaningsNoun1. middle-old (person between 75 and 84 years old)Kanji used後after期period (of time)高high齢age者someoneComposed of後こう期きlatter period; second half; late stage; third trimester; second semesterNoun高こう齢れい者しゃold person; elderly person; senior citizenNoun