When it comes to definitions..

I agree with https://activitypub.rocks that there is a "federated social web" and #ActivityPub is part of it.

Yet AS/AP are technical protocols, open standards. To me its obvious that Social Web is more than that. I define it as:

#SocialWeb is where people do social networking online, using the technologies available to them.

Then there's #Fediverse. I think this term will become as common as "web" and "internet" with no one pondering its on-the-wire protocols.