This is the 1440th most frequent Russian word.
западной
"Западной" means "western" in English.
Used as an adjective to describe a location.
Мы поехали в западной части города.
We went to the western part of the city.
Used as an adjective to describe a region.
Она изучает культуру западной Европы.
She studies the culture of Western Europe.
Used as an adjective to describe directional orientation.