Elderly Person
Old Person
noun
Someone of tall age is going to be an elderly person or an old person.
こうれいしゃ
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
高齢者たちは、雇用について難しい問題を抱えています。
Elderly people have difficult problems with employment.