The Collaborative International Dictionary
No-man's land
No-man's land \No"-man's` land`\, No-man's-land \No"-man's`-land`\
(Naut.) A space amidships used to keep blocks, ropes, etc.; a space on a ship belonging to no one in particular to care for.
An unoccupied area between opposing armies.
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Hence: (Fig.): An unclaimed space or time.
That no-man's land of twilight.
--W. Black.