柯林斯詞典crash helmet (crash helmets) 1. N-COUNT A crash helmet is a helmet that motorcyclists wear in order to protect their heads if they have an accident. (騎摩托車人帶的)防撞頭盔 返回 crash helmet劍橋詞典a hard hat that covers and protects the whole head , worn especially by motorcyclists （尤指摩托車手戴的）防護(hù)頭盔，安全帽 返回 crash helmet