Definition of "hypervisor" []

• A software and/or firmware system that provides a virtual machine and allows it to operate directly on underlying hardware (instead of via emulation), but within specified constraints. (noun)

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• "A new version of the free Xen hypervisor is now available to download."
• "For example, the SPE could request hashes of regions of the calling hypervisor and use this to detect patching."
• "There is commoditization pressure, especially for the base-level hypervisor, which is being given away for free by rivals."