English

Noun

geofence ‎(plural geofences)

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.
   • PetsMobility, in a document quoted in The Geopolitics of American Insecurity: Terror, Power and Foreign Policy (François Debrix, Mark J. Lacy), page 101:

     Establish a remote programmable geofence around a yard or campus, and use handy notification features that alert your cell phone when a breach occurs.

   • 2011, Chuck Martin, The Third Screen: Marketing to Your Customers in a World Gone Mobile, page 144:

     A geofence could be a mile or more around a store or it could be fifty feet from the front door, whatever the business decides.

   • 2012, Dan Burges, Cargo Theft, Loss Prevention, and Supply Chain Security:

     It is recommended that the load be monitored actively or that alerts in the event of a geofence break be sent to an offsite monitoring service in addition to the shipper's point of contact in order to expedite the escalation […]

Verb

geofence ‎(third-person singular simple present geofences, present participle geofencing, simple past and past participle geofenced)

1. (transitive) To provide a geofence around (an area).