My attempt at a short description of the term “apostasy.” Corrections and suggested additions are most welcome.
APOSTASY – The abandonment or forsaking of faith or commitment to follow the Lord, often described as a turning away (Jer 8:5 NASB, NET) or falling away (Heb 6:6 NET). Apostasy results in punishment (Jer 2:19 ESV), hence the many warnings against it (2 Thes 2:3; 1 Tim 4:1f; 2 Pet 3:17; Jude 1). Apostates include Hymanaeus and Alexander (1 Tim 1:19-20), Demas (2 Tim 4:10) and Phygelus and Hermogenes (2 Tim 1:15). By Jesus’ word one may avoid falling away (John 16:1). The word is a transliteration of the Greek term, apostasia.
These are not my choice of abbreviations for Bible books, but I use them to preserve the reference links. For the same reason I reference Jude 1, although it actually has no chapters. NET linking isn’t functioning; I probably need to update. But pay attention to the content, not the format, please, unless the latter harms the former.