Except antichrist is anything we humans express toward others in outward visible fashion that is not the Christ nature. For example, if I get the unction to be impatient towards another and I follow that thought to be impatient, then I will express impatience. That expression is the antichrist. Why? Because God our Heavenly Father is patience. And the expression of him through you towards others is Christ the Son of God. That’s just one example, there are many corrupt thoughts people follow and the expression of any corrupt thought is the antichrist.
It cannot be disputed, the things we do are a direct result of the thoughts we follow. Jesus said, Follow me.