An Antiverse is practically a universe full of anti-matter instead of your usual normal matter. Physics here
might be different or still, the same, Beings from this universe will think that the anti-matter they have is normal matter and our universe is anti-matter. Its size is 1.2 septillion light-years. Antiverse applies to all verses below the Voidverse i.e. Antixenoverse, Anti-etc... The largest antiverses are the AntiUNNAMEDverse (a.k.a the unknown antiomniverse).