crash barrier

:  to break violently and noisily :  smash

:  to damage (an airplane) in landing

:  to cause to make a loud noise

:  a loud sound (as of things smashing)

:  a breaking to pieces by or as if by collision

:  an instance of crashing

:  marked by a concerted effort and effected in the shortest possible time especially to meet emergency conditions

:  a coarse fabric used for draperies, toweling, and clothing and for strengthening joints of cased-in books

:  something material that blocks or is intended to block passage

:  a natural formation or structure that prevents or hinders movement or action

:  a medieval war game in which combatants fight on foot with a fence or railing between them