A-frame (??fr?m?)n. A structure, such as a house, with steeply angled sides that meet at the top in the shape of the letter A.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.A-frame adj (Architecture) (of a house) constructed with an A-shaped elevation Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014A-frame (?e??fre?m) n. a building with a steep gabled roof resting directly on a foundation. [1960?65] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.