I got the idea to open this thread and to put this question about meta-ethnicity after reading the thread
What is Slavic? and especially
this post of Ostrogorski in which he insists that Slavs are meta-ethnicity
beyond any doubt and not solely due to the linguistic affinity.
I find the very concept of meta-ethnicity as very problematic and I am pretty unsure as to how it is to be defined. That does not mean that I outright deny the existence of the very thing, I am just saying that I have no definite opinion or view of what that is supposed to mean, given the fact that I was able to witness many different - and sometimes conflicting each other - definitions of the term. I allow even the possibility that it is a pure construct.
That is why I would appreciate to hear different opinions about that.
(And, no, I didn't open a poll, 'cause I hate polls, unlike some other members of Stirpes
)