This is the 7228th most frequent Russian word.
визовые
"Visa-related" or "pertaining to visas."
The word 'визовые' is used here as an adjective, describing documents related to visas.
Я получил визовые документы для поездки за границу.
I received visa documentation for a trip abroad.
In this sentence, 'визовые' is again an adjective, modifying 'разрешений', referring to permits associated with visas.
Процесс получения визовых разрешений может занять несколько дней.
The process of obtaining visa permits can take several days.
Here, 'визовый' is a singular adjective modifying 'центр', referring to a center associated with visa services.