middle age
US /ˌmɪd.l̩ ˈeɪdʒ/
UK /ˌmɪd.l̩ ˈeɪdʒ/
1.
the period of life between youth and old age, usually considered to be between the ages of 45 and 65
:
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He's in his middle age, but still very active.
•
Many people experience a 'midlife crisis' during middle age.