Traditionally, cloud referred to an abstraction above "someone else's computer", keeping the specific details of those computers hidden from the user, allowing the operator to do things like swap out the hardware, move the data to another datacenter, etc. without the end user ever noticing.
But tech people love to come up with new definitions for the same terms all the time, so anything goes.
But tech people love to come up with new definitions for the same terms all the time, so anything goes.