flight deckn.1. The upper deck of an aircraft carrier, used as a runway.2. An elevated compartment in certain aircraft, used by the pilot, copilot, and flight engineer.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.flight deck n 1. (Aeronautics) the crew compartment in an airliner. Compare cockpit1 2. (Nautical Terms) the upper deck of an aircraft carrier from which aircraft take off and on which they land Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014flight? deck` n. 1. the upper deck of an aircraft carrier, designed for the landing and takeoff of aircraft. 2. an elevated compartment in certain aircraft containing the instruments and controls used by the crew. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.flight deck1. In certain airplanes, an elevated compartment occupied by the crew for operating the airplane in flight.2. The upper deck of an aircraft carrier that serves as a runway.Dictionary of Military and Associated Terms. US Department of Defense 2005.