You’re not the word on it.
The Bible is.
The term "antichrist" is used in the Bible, primarily in the letters of John, to describe both a spirit of opposition to Christ and a specific individual who will appear at the end of time. Key verses include 1 John 2:18, which notes that "many antichrists have come," 2 John 7, describing the deceiver and antichrist as one who denies Jesus Christ's coming in the flesh, and 2 Thessalonians 2:3 which speaks of the "man of lawlessness" who opposes God