From Longman Dictionary of Contemporary Englishno-fly zoneno-ˈfly ˌzone noun [countable] PMPTTAan area that only particular aircraft are allowed to enter, and in which other aircraft could be attacked
Examples from the Corpus
no-fly zone• In the south the enforcement of a no-fly zone by western aircraft has raised the possibility of a Shia secession.• S.-enforced no-fly zone.• A second no-fly zone covers the Kurds in the north of the country.• However, those ships can not enforce the no-fly zone. 