A hypervisor or virtual machine monitor (VMM) is computer software, firmware, or hardware, that creates and runs virtual machines. A computer on which a hypervisor runs one or more virtual machines is called a host machine, and each virtual machine is called a guest machine. The hypervisor presents the guest operating systems with a virtual operating platform and manages the execution of the guest operating systems.
Definition of REGRESS. 1. a: an act or the privilege of going or coming back b: reentry 1. 2. : movement backward to a previous and especially worse or more primitive state or condition. 3. : the act of reasoning backward.
Frederic Harrison Its bearing on the progress or regress of man is not an inconsiderable question. The power or liberty of passing back. William Shakespeare Thou shalt have egress and regress. In property law, the right of a person (such as a lessee) to return to a property.