AN'TI-CHRIST, noun [Gr. against, and Christ.] A great adversary of Christ; the man of sin; described 1 John 2:18. 2 Thessalonians 2:1. Revelation 9:1. Protestants generally suppose this adversary to be the Papal power; and some divines believe that, in a more general sense, the word extends to any persons who deny Christ or oppose the fundamental doctrines of christianity.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI