KWANGYA (광야/Gwang-ya) is a word in Korean meaning "wilderness". Wilderness means the wilds, waste, jungle or dessert. KWANGYA is a world where the avatars live.
In aespa’s lyrics Black Mamba, "Neon gwangyareul tteodolgo isseo" translates "You wander this KWANGYA". In the song it means 'You wander this unknown world'. In NCT U’s lyrics 90’s Love, " gwangyaleul neomeo deoug gakkai wa" translates to "Come closer beyond the KWANGYA". In this song, it means to 'Come closer beyond the wilderness or world'.