What is the meaning of Roaming?

present participle and gerund of roam

An instance of wandering.

The ability to use a cell phone outside of its original registering zone.

The use of a network or service from different locations or devices.

Using the OS service of manipulating folders and documents from different PC devices by a registered user.

roaming (using a cell phone outside of its original registering zone)

roaming

roaming (telephony)

Source: wiktionary.org