n. a spike, wedge, or peg that is driven into a rock or ice surface as a support (as for a mountain climber)
v. to put pitons into a rock/ice to facilitate climbing
the GNU version of the Collaborative International Dictionary of English
n. A metal spike having a sharpened point on one end, and a hole through which a rope can be passed on the other; it is driven into the face of a rock cliff during climbing, and used as an anchor point for a rope.
The Century Dictionary and Cyclopedia
n. A point; a peak.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a metal spike with a hole for a rope; mountaineers drive it into ice or rock to use as a hold
Word Usage
"Trailing behind the piton was a microthin line of duranium cable."