"Runtime" refers to the period of time when a program or software is running or being executed. It is the duration between starting a program and its completion or termination. Full definition
An 8 hours of runtime for «active use» is pretty decent, especially for a Wi - Fi enabled device. (goodereader.com)
Eventually, the 145 - minute runtime of «In Darkness» starts to feel long. (chicagotribune.com)
However, some of the most intense and draining moments I've had as a gamer occurred during the 15 - 20 hour runtime of this horror sequel. (thehdroom.com)