satnav
A satellite navigation system used in a vehicle to provide directions and location data via GPS.
Noun
pl: satnavs
This term is a portmanteau of satellite and navigation, primarily used in British English. It carries a practical, utilitarian connotation, referring specifically to the hardware or the software interface used for driving directions. In North American English, the term GPS is far more prevalent, whereas satnav is the standard colloquialism in the UK.
As a countable noun, it follows standard English pluralization rules. It is typically used in contexts involving travel, commuting, or automotive technology, often appearing in phrases regarding the reliability or accuracy of the device.