CycleTime is the total time from the beginning to the end of your process, as defined by you and your customer. CycleTime includes ProcessTime?, during which a unit is acted upon to bring it closer to an output, and DelayTime?, during which a unit of work is spent waiting to take the next action.
In a nutshell - CycleTime is the total ElapsedTime? to move a unit of work from the beginning to the end of a PhysicalProcess?. (Note, CycleTime is not the same as LeadTime?).