middle-aged

US /ˌmɪd.əlˈeɪdʒd/
UK /ˌmɪd.əlˈeɪdʒd/
"middle-aged" picture
1.

mittelalt, im mittleren Alter

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.
Meine Eltern sind beide im mittleren Alter.
The survey targeted middle-aged professionals.
Die Umfrage richtete sich an mittelalte Fachkräfte.