- an area over which no military flights are allowed.
Origin of no-fly zone
First recorded in 1991
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- an area in which aeroplanes may not fly, esp during wartime
- a taboo subject
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012