sky·writ·ing (sk??r??t?ng)n.1. The process of writing in the sky by releasing a visible vapor from an airplane.2. The letters or words so formed.sky?write? v.sky?writ?er n.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.skywrite (?ska??ra?t) vb (intr) , -writes, -writing, -wrote or -written (Aeronautics) to write a message in the sky with smoke trails from an aircraftCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014