Definitions

1. noun

a short, tapered spike or hook, typically of metal, used for climbing or anchoring

“The rock climber used a piton to secure her rope to the wall.”

2. noun

a large, pointed rock or boulder

“The hikers had to navigate around a large piton in the trail.”

3. verb

to drive or fix (a piton) into a rock or other surface

“The climbers pitted the rock to secure their anchor.”