no man's land

noun11

1. •
   The ground between trenches where a soldier from either side would be easily targeted.
2. •
   Territory that is often disputed, and that cannot be inhabited because of fear of conflict.
3. •
   The stretch of land between the border posts of two contiguous sovereign states, sometimes separated by great distance.
4. •
   Land that is not claimed by any recognized sovereign state; a terra nullius.
5. •
   (historical) Tracts of uninhabited territory close to the Iron Curtain.
6. •
   The part of a prison, hospital complex, etc. where individuals are not normally allowed to enter.
7. •
   (figurative) A place where no one can or should be present.

   • Now, George, if you’re going to consider this question from the point of view of poetry, you’re off to No Man’s Land, where I won’t follow you. — 1867
8. •
   The area between the backcourt and the space close to the net, from which it is difficult to return the ball.
9. •
   An area of the field where a fielder cannot save a single, nor stop a boundary.
10. •
    A space amidships used to keep blocks, ropes, etc.; a space on a ship belonging to no one in particular for which to care.
11. •
    The fibrous sheath of the flexor tendons of the hand, specifically in the zone from the distal palmar crease to the proximal interphalangeal joint.