This is the 8806th most frequent Russian word.
польское
"Polish" (relating to Poland).
In this sentence, 'польское' describes the television as associated with Poland, signifying its national identity.
Польское телевидение начало транслировать новый сериал.
Polish television began broadcasting a new series.
In this context, 'польское' functions as an adjective describing a type of art, specifically related to Poland.
Я изучал польское искусство в университете.
I studied Polish art at the university.
Here, 'польское' acts as an attributive adjective describing a literary work's origin, linking it to Poland.