An area into which entry by a single individual is prohibited; commonly an area with accessibility to a nuclear weapon.

Alternative spelling of no-lone zone

(sports) The bottom part of e.g. a sports table, listing how well teams have played over a period of time. All teams that end up in the relegation zone are relegated.

A neutral area, between hostile forces, designed to prevent hostilities. / (US) A transitional area between areas of different land use.

plural of relegation zone

(geology) A region of the Earth where one tectonic plate dives beneath another into the interior of the Earth.

(astronomy) The region of the Universe in alignment with the galactic plane of the Milky Way where few galaxies were initially seen due to dust interfering with the view of ground-based telescopes.

(geology) the layer of the Earth's crust, at the top of the asthenosphere, where most earthquakes originate

(informal, intransitive) To stop paying attention and think about something else, or to think about nothing

plural of war zone