Definition: airplane mode
A smartphone mode that is turned on when traveling on a plane to disable cellular transmission, Wi-Fi and Bluetooth. Music, photos, videos, games and any application that does not depend on transmitting or receiving signals can still be used by the passenger.
Wi-Fi Back On
Once in airplane mode, Wi-Fi can generally be turned back on, which allows passengers on a plane to use the in-flight Wi-Fi. It also lets travelers in another country use local Wi-Fi hotspots but not roam on a foreign cellular network.