Definitions for danger area
an airspace within which it is dangerous for aircraft to fly.
A rectangular protected area of the pitch on which bowlers may not run in their follow through so as to avoid damage.
Dictionary of Military and Associated Terms
1. In air traffic control, an airspace of defined dimensions within which activities dangerous to the flight of aircraft may exist at specified times. 2. (DOD only) A specified area above, below, or within which there may be potential danger. See also closed area; prohibited area; restricted area.