(n)(Christianity) the adversary of Christ (or Christianity) mentioned in the New Testament; the Antichrist will rule the world until overthrown by the Second Coming of Christ
The Collaborative International Dictionary of English (GCIDE) v.0.53Collaborative International Dictionary (GCIDE)
n. [ L. Antichristus, Gr. &unr_;; 'anti` against + &unr_;. ] A denier or opponent of Christ. Specif.: A great antagonist, person or power, expected to precede Christ's second coming. [ 1913 Webster ]