I stick to Scripture (the Holy Bible) when it comes to these questions or issues. There is an Antichrist (singular) and there are many antichrists (plural). The word "Satan" literally means adversary. In the singular sense, I take it to mean "The Serpent," "The Great Dragon," "The Tempter," Lucifer, Beelzebub, "The Accuser," "The Father of Lies," Belial, or the fallen archangel, Satan. In the plural sense, I take it to mean individuals, organizations, or religious bodies that make it their foremost goal to oppose all things Christian.