rock climbing

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The sport or activity of climbing sheer rock faces or walls that simulate such rock faces, especially by means of specialized techniques and equipment.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The sport of scaling rock faces, either with or without ropes and other equipment.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the sport or pastime of scaling rock masses on mountain sides (especially with the help of ropes and special equipment)