1. An unoccupied area between the front lines of opposing armies
   "The soldiers cautiously crossed the no man's land between the trenches"
    
2. Land that is unowned and uninhabited (and usually undesirable)
   "The disputed territory became a no man's land between the two warring factions"
    
3. The ambiguous region between two categories, states or conditions (usually containing some features of both)
   "in that no man's land between negotiation and aggression";
   - twilight zone

Derived forms: no man's lands

Type of: ambiguity, area, country, equivocalness, land

Encyclopedia: No man's land