an area for the servicing and maintenance of airplanes that includes parking ramps and hangars.
Origin of flight line
First recorded in 1940–45
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
an area of an airfield or airport on which aircraft, esp military aircraft, are parked and serviced
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