This is the 15207th most frequent Polish word.
seniorskiej
"Of senior" or "senior-related" (adjective form).
The word 'seniorskiej' pertains to an association or group intended specifically for senior members of the community.
Moja babcia jest członkinią lokalnej grupy seniorskiej.
My grandmother is a member of the local senior group.
Here, 'seniorskiej' is used to describe the target audience, which consists of senior individuals.
Program telewizyjny zawierał segment dla seniorskiej publiczności.
The television program included a segment for the senior audience.
In this usage, 'seniorskiej' characterizes the difficulty level of the activity as suitable for seniors.