KWANGYA (Hangul: 광야, Gwang-ya) is a word in Korean meaning "wilderness". Wilderness means the wilds, waste, jungle or desert. KWANGYA is a world where the avatars live.
In Black Mamba, "넌 광야를 떠돌고 있어" (Neon gwangyareul tteodolgo isseo) is translated as "You wander this KWANGYA". In the song it means 'You wander this unknown world'. In NCT U’s lyrics for their single, titled "90’s Love", "광야를 넘어 더욱 가까이 와" (gwangyareul neomeo deoug gakkai wa) is translated to "Come closer beyond the KWANGYA". In this song, it means to 'Come closer beyond the wilderness or world'.
In 'ep1. Black Mamba', KWANGYA is described as an unruled and infinite place located beyond FLAT. NAVIS can open portals to this location, while the æ didn't seem to have heard of KWANGYA before. The Black Mamba is disrupting SYNK from there.
In NCT Dream's song "Hello Future", "온 세상과 저 광야 위로" (on sesanggwa jeo gwangya wiro) is translated to "Over the whole world and KWANGYA".
In the Next Level music video, the coordinates of KWANGYA were revealed (37°32'40.2"N 127°02'40.0"E (37.544500, 127.044444)). These coordinates are the location of S.M. Entertainment's Seoul offices.
In TVXQ's Changmin's 'Devil', KWANGYA is mentioned ("In the twisted KWANGYA / Walk towards the light"). In the music video, during this lyric, Changmin is seen staring at a beam of light that shines through a large rock. The camera later shifts to an angle through which the viewer is looking at Changmin through a hole, the perspective of where the beam of light would be.