par avion (par avj??) adv (Telecommunications) by aeroplane: used in labelling mail sent by airCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014par a?vion (pa ra?vy??) adv. French. by airplane (used on matter sent by airmail). Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.par avionA French phrase meaning by airplane, used to label air mail.Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited