geofence

/ˈdʒiːə-/

IPA: /JH IY1 AA1 F AH0 N S/

noun
  1. 1

    A virtual perimeter around a geographic area, typically enforced by monitoring the positions of trackable mobile devices inside or outside the area, and determining if they cross the "fence".

verb
  1. 1

    To provide a geofence around (an area).

Source: https://en.wiktionary.org/wiki/geofence