Abbott-Smith Manual Greek Lexicon
αἵρεσις (G139)
9 αἵρεσις , -εως, ἡ ( αἱρέω , -ομαι ), [in LXX for נְדָבָה ,] capture . choosing , choice (v. MM, VGT , s.v.). that which is chosen , hence, opinion ; esp. a peculiar opinion , heresy : I Co 11:19 , Ga 5:20 , II Pe 2:1 , R, txt. In late writers (MM, VGT ), of a set of persons professing particular principles or opinions, a school, sect, party, faction : Ac 5:17 15:5 24:5 , 14 26:5 28:22 , I Co 11:19 , Ga 5:20 , II Pe 2:1 , R, mg. (Cremer, 614).†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain