Secretly; in a clandestine manner.
In or into a situation or place in which electricity from the public electricity system is not used.
In or into a clandestine or isolated situation or place, especially one in which public communication is curtailed.
Not connected to a publicly available communication system, such as the World Wide Web or a mobile telephone network.
Isolated; in a remote location; in seclusion; not participating in some official process or system.
Not using electricity from the public electrical supply system.
In secret or covertly; privately, confidentially.
Carried out secretly or confidentially.
Covert surveillance video used to catch workers’ compensation applicants and show that they are in fact not injured.