This page provides all possible meanings and translations of the word no-fly zone
Random House Webster's College Dictionary
an area over which no military flights are allowed.
Origin of no-fly zone:
an airspace in which aircraft, especially military aircraft, are forbidden to fly
A no-fly zone is a territory or an area over which aircraft are not permitted to fly. Such zones are usually set up in a military context, somewhat like a demilitarized zone in the sky, and usually prohibit military aircraft of a belligerent nation from operating in the region.
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