middle-aged
US /ˌmɪd.əlˈeɪdʒd/
UK /ˌmɪd.əlˈeɪdʒd/

1.
de meia-idade, meia-idade
being in the period of life between youth and old age, usually considered to be from about 45 to 65
:
•
My parents are both middle-aged.
Meus pais são ambos de meia-idade.
•
The survey targeted middle-aged professionals.
A pesquisa visou profissionais de meia-idade.