A metal spike fitted at one end with an eye fixed for securing a rope and driven into stone or ice as a support in mountain climbing.
a spike, wedge, or peg that is driven into a rock or ice surface as a support (in terms of a mountain climber)
A metal increase having a sharpened point on one end, and a hole by which a rope may be offered another; it is driven to the face of a rock cliff during climbing, and used as an anchor point for a rope.
a spot; a peak.
a metal increase with a hole for a rope; mountaineers drive it into ice or rock to make use of as a hold
How would you define piton?