άποστασία, -ας, ἡ
(ἀφίστημι), [in LXX for מַעַל, etc. ;]
defection, apostasy, revolt; in late Gk. (MM, Exp., viii; Lft., Notes, 111; Cremer, 308) for cl. ἀπόστασις, frequently in sense of political revolt, in LXX (e.g. Jos.22:22, 2Ch.29:19, Jer.2:19) and NT always of religious apostasy: Act.21:21, 2Th.2:3.†
(AS)