air·wor·thy (âr?wûr?th?)adj. air·wor·thi·er, air·wor·thi·est Being in fit condition to fly: an airworthy helicopter.air?wor?thi·ness 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.airworthy (????w??ð?) adj (Aeronautics) (of an aircraft) safe to fly ?air?worthiness nCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014air?wor?thy (???r?w?r ði) adj. -thi?er, -thi?est. (of an aircraft) equipped and maintained in condition to fly. [1820?30] air?wor`thi?ness, n. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.