Biblical Word Etymology
The Etymology of “Apostasy”
The biblical word “Apostasy” traces back to Greek (apostasia (Greek)), where it meant “A total falling away from the faith; abandonment of the covenant and worship of the true God”. Across 3eras it evolved into the modern sense: “The abandonment of a religious faith; the renunciation of beliefs previously held”.
How the Meaning Evolved
Ancient Hebrew/Greek
Greekapostasia (Greek)A total falling away from the faith; abandonment of the covenant and worship of the true God
Greek apostasia (G646) from apo (away) + stasis (standing). Used in 2 Thessalonians 2:3 for the 'falling away' before end times; also for Jews rejecting Jesus (Acts 21:21).
Medieval Latin / Church
LatinapostasiaThe renunciation of Christian faith and sacraments; the highest form of heresy and rebellion against God
Latin apostasia from Greek. Canon law treated apostasy as distinct from heresy: total rejection versus false doctrine. Apostates faced excommunication and corporal punishment.
Modern English
EnglishapostasyThe abandonment of a religious faith; the renunciation of beliefs previously held
From Late Latin and Greek via Old French. Used in theology for complete renunciation of faith; in historical contexts for religious conversion or defection.