/wȯl tīm/
n. (also wall clock time)
- Real world time (what the clock on the wall shows), as opposed to the system clock's idea of time.
- The real running time of a program, as opposed to the number of clocks required to execute it (on a timesharing system these will differ, as no one program gets all the clocks, and on multiprocessor systems with good thread support one may get more processor clocks than real-time clocks).