a system by which signals are sent from satellites to a special device, used to show the position of a person or thing on the surface of the earth very accurately (the abbreviation for ‘global positioning system’) 全球定位系统（全写为 global positioning system）
The drivers all have GPS in the van.这些司机的厢式货车里都装有全球定位系统。🔊🔊
She switched on the GPS system before she left the airport.她在离开机场之前打开了GPS系统。