a computer system that uses information obtained from satellites to guide the driver of a vehicle (the abbreviation for ‘satellite navigation’) 卫星导航(全写为 satellite navigation,利用接收到的卫星信息为驾车者导航的计算机系统) The drivers all have satnav in the van. 司机都在货车里安装了卫星导航。 She switched on the satnav system before she left the airport. 她离开机场前打开了卫星导航系统。 This satnav is very easy to use. 这个卫星导航很容易使用。