roof rack

noun

1. 车顶行李架
   a metal frame fixed to the roof of a car and used for carrying bags, cases and other large objects

1. （汽车）车顶行李架
   A roof rack is a metal frame that is fixed on top of a car and used for carrying large objects.

in AM, use 美国英语用 luggage rack

1. Standardization and Diversity of Steel Housing System C payments, roof boarding processing; Light structural steelwork, rack manufacture, marketing; Steel sales.
   轻钢轻板住宅体系的标准化与多样性C型钢、面板加工；轻钢结构、架制造、售；钢材销售。

noun

1. carrier for holding luggage above the seats of a train or on top of a car

   Synonym:    luggage rack