(in mountaineering) the act or method of moving down a steep incline or past an overhang by means of a double rope secured above and placed around the body, usually under the left thigh and over the right shoulder, and paid out gradually in the descent.
–verb (used without object)
2.
to descend by means of a rappel.
Origin: 1930–35; < F: mountaineering term, lit., a recall. See repeal
rap·pel (rā-pěl') n. A descent of a vertical surface, as a cliff or wall, by sliding down a belayed rope that is passed under one thigh and over the opposite shoulder or through a device that provides friction, typically while facing the surface and performing a series of short backward leaps to control the descent. intr.v.
rap·pelled, rap·pel·ling, rap·pels To descend from a steep height by this method.
[French, recall, return, rappel, from Old French, recall, from rapeler, to recall : re-, re- + apeler, to summon; see appeal.]