Definition of "unrestrained"

Managing unrestrained prisoners alone in any environment is inherently dangerous and should not be tolerated.

2009, Russell Colling, Tony W. York, Hospital and Healthcare Security, page 346

In an accident there will often be injuries, as people are unrestrained. But in the case of Sandilands, I don't think anyone would have foreseen the seven deaths and 62 injuries that occurred when the tram overturned [...].

2021 December 29, Dominique Louis, “Causal analysis: crashworthiness at Sandilands”, in RAIL, number 947, page 32