A purely Scripture-based definition of antichrist2,3,4,5 requires no human speculation or pontification. It would not be a proper name (capital “A”), but rather a concept or classification – literally, “every spirit that does not confess Jesus”4,5 or anyone that “denies the Father”3. John clearly defines this and tells us that antichrist is “in the world already”4 and were “many”2. We also have Jude’s testimony7 about false teachers, written during the same time period and mirroring John’s definition of the antichrist.
Now having a firm standing from what Scripture has made clear, we can review other, less-clear passages that may apply. These would include what John sees in his vision1 and what Paul writes to the Thessalonians6 (and possibly Jesus’ statements provoked by the Temple visit7). To be clear, these do not speak of “the Antichrist” and shortcomings for anyone to definitively interpret in that way have been noted.
However, what is unequivocally clear in these passages is that while opposition to God exists and will exist, He remains sovereign and in due course will be triumphant over evil…as will all those that remain faithful to the end1,6,7.