'abseil' definitions:

noun

(mountaineering) a descent of a vertical cliff or wall made by using a doubled rope that is fixed to a higher point and wrapped around the body [syn: rappel, abseil]

verb

Lower oneself with a rope coiled around the body from a mountainside; "The ascent was easy--roping down the mountain would be much more difficult and dangerous"; "You have to learn how to abseil when you want to do technical climbing" [syn: rappel, abseil, rope down]