middle age
US /ˌmɪd.l̩ ˈeɪdʒ/
UK /ˌmɪd.l̩ ˈeɪdʒ/

1.
중년
the period of life between youth and old age, usually considered to be between the ages of 45 and 65
:
•
He's in his middle age, but still very active.
그는 중년이지만 여전히 매우 활동적이다.
•
Many people experience a 'midlife crisis' during middle age.
많은 사람들이 중년에 '중년의 위기'를 겪는다.