This term comes from the Greek "antì" which means "Messiah or Christ" substitute or opposite and "khristós", that is why in the Christian religion the antagonistic figure of the son of God is called antichrist, which is described in the letters of the apostle John, also in the books of Revelation and the apostle Paul, refers to that character without mentioning him directly.
According to Christians, the antichrist is a figure that will appear just before the coming of Jesus Christ and after the so-called rapture (Christians are raised to heaven by God), he will impersonate God to rule the world during the Great Tribulation, but at the same time it will persecute and annihilate all those who follow the true God, since only those who follow the doctrine of the antichrist will be considered correct, denying the divinity of Christ by saying that Jesus was not the son of God but him. At the end of his era of domination, the Bible points out that God's army will defeat him and that God himself will send him into the lake of fire.
In the ancient world it was understood that the Antichrist was a demon with a human aspect and that he would come to Earth to deceive men.
On the other hand, the German philosopher Friederich Nietzsche exposed his criticism of the values of Christianity in his famous work The Antichrist. Some of these visions coincide in that: Satan sends a false prophet to lie to men and that false prophet is the Antichrist.
Throughout history, many have been the characters considered antichrist, among which we can mention Neron, Caligula, Napoleon Bonaparte and Adolf Hitler, the latter named as the worst dictator in history and responsible for the murder of more than 6 million of Jews.
Another use that is given to this word is to catalog those Christians who are considered as false to the faith, since seen from another point of view, the meaning is "the one who opposes the Messiah" and the name found in The book of The Apostle John refers to many antichrists, ruling out the possibility of a single person, since throughout the history of Christianity, thousands have been the deflators of Jesus Christ and his miracles.
It should be noted that in religions other than Christian there is also a belief in characters similar to the antichrist, for example: in Islam, the arrival of Mahdi is believed just before the coming of the Messiah, who will be the incarnation of evil
The official position of Catholics is this: anyone who stands up to the true Christ is the Antichrist. Consequently, in Catholic doctrine, the figure of the Antichrist is dissociated with the book of Revelation.
From the Catholic perspective, those Christians who stray from the authentic Christ, those who live in sin, or those who believe in the power of Satan are the true Antichrist. In other words, the Antichrist identifies himself with any evil manifestation that can lead human beings to destruction.