senior citizen
US /ˌsiː.njɚ ˈsɪt.ɪ.zən/
UK /ˌsiː.njɚ ˈsɪt.ɪ.zən/

1.
persona mayor, adulto mayor
an elderly person, especially one who is retired and receiving a pension
:
•
The museum offers discounts for senior citizens.
El museo ofrece descuentos para personas mayores.
•
Many senior citizens enjoy community activities.
Muchos adultos mayores disfrutan de actividades comunitarias.