piaffe (py?f)intr.v. piaffed, piaf·fing, piaffes To perform the piaffer.[French piaffer.]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.piaffe (p??æf) or piaffern (Horse Training, Riding & Manège) dressage a passage done on the spot[C18: from French, from piaffer to strut]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014