FASabbr.1. fetal alcohol syndrome2. Foreign Agricultural Service3. free alongside shipAmerican 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.FAS or f.a.s.abbreviation for (Commerce) free alongside shipCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014FAS 1. fetal alcohol syndrome. 2. Foreign Agricultural Service. F.A.S. or f.a.s., free alongside ship. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.