This is the 7205th most frequent Russian word.
великолукский
"Of or related to Velikiye Luki," a town in Russia.
Here 'великолукский' is used as an adjective describing a district related to Velikiye Luki.
Я живу в Великолукском районе.
I live in the Velikoluksky district.
Here 'великолукский' is used as an adjective qualifying 'сыр', indicating the cheese originates from Velikiye Luki.
Великолукский сыр считается одним из лучших в регионе.
Velikoluksky cheese is considered one of the best in the region.
Here 'великолукская' is an adjective modifying 'продукция', meaning products coming from Velikiye Luki.