Anything that augments your physical life, to the digital, is in some way or form linked to what currently is, and what will become, ‘The Metaverse’.
So a Zoom call or a free world game — whilst they don’t wholly agree with the notion of interoperability or persistence —they still are in essence part of the Metaverse.
Now, to give further context, there is the idea of ‘Metaverses’ — aka, Decentraland, Sandbox or any company building their own virtual world.