This is the 1214th most frequent Polish word.
krajowej
"National" or "domestic."
Here, 'krajową' describes the organization, emphasizing that it's at the national level.
Uczestniczę w konkursie krajoznawczym organizowanym przez organizację krajową.
I am participating in a geographical contest organized by a national organization.
In this context, 'krajowa' is used as an adjective to describe the road as belonging to the national road network.
Droga krajowa numer 7 prowadzi z Gdańska do Warszawy.
National road number 7 leads from Gdańsk to Warsaw.
Here, 'Krajowej' identifies the official name of the entity, signifying its jurisdiction at the national level.