A terminal space is a word that describes a third space that cannot be called anything, and it is a word that cannot be defined by any boundary and is difficult to explain.
These days, it is used as a word derived from these dictionary and academic meanings,
It is a word that gives a sense of incongruity, instability, or fear like the picture above.
These days, it is used very often as a material for ghost stories and horror films, and I really like it!