柯林斯词典roof rack (also roof-rack) (roof racks) 1. N-COUNT A roof rack is a metal frame that is fixed on top of a car and used for carrying large objects. 车顶支架[英国英语] 返回 roof rack剑桥词典a frame fixed on top of the roof of a vehicle , for carrying large objects （汽车）车顶行李架 返回 roof rack