rock climbingn. The sport or activity of climbing sheer rock faces or walls that simulate such rock faces, especially by means of specialized techniques and equipment.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.rock climbing n (Mountaineering) the technique and sport of climbing on steep rock faces, usually with ropes and other equipment and as part of a team or pair Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014