ˈcrash ˌhelmet BrE AmE noun [countable]
a very strong hard hat that protects your head, and is worn by racing car drivers, people riding ↑ motorcycle s etc
ˈcrash ˌhelmet BrE AmE noun [countable]
a very strong hard hat that protects your head, and is worn by racing car drivers, people riding ↑ motorcycle s etc
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012