["< sod > a'''fail - safe'''is a device or practice that, in the event of a specific type of [ [ failure causes | failure ] ], it responds or results in a specified way that will cause no harm, or at their least minimizes that harm, to other devices or to personnel. < eod > < sod > a'''fail - safe'''in engineering is a device hardware or practice that, in the event of a specific type if of [ [ failure causes | failure ] ], inherently responds appropriately or typically results in a way that that will cause no or minimal intentional harm, to other equipment, the environment or to people. < eod >"]