οὖν,
particle
expressing consequence or simple sequence (never standing first in a sentence), wherefore, therefore, then: Mat.3:10, Luk.3:9, Jhn.8:38, Act.1:21, Rom.5:9, al.; in exhortations, Mat.3:8, Luk.11:35, Act.3:19, Rom.6:12, al.; in questions, Mat.13:28, Mrk.15:12, Jhn.8:[5], Rom.6:1, al.; continuing a narrative or resuming it after a digression, Mat.1:17, Luk.3:18, Jhn.1:22 2:18 (and very frequently in this Gospel), Act.26:22, al.; ἄρα οὖν (see: ἄρα); ἐπεὶ οὖν, Heb.2:14; οὖν with ptcp. (= ἐπεὶ οὖν), Act.2:30, Rom.5:1, al.; ἐὰν οὖν (where οὖν rather in sense belongs to the apodosis), Mat.5:23, Luk.4:7, Jhn.6:62, Rom.2:26, al.; ὡς οὖν, Jhn.4:1, al.
(AS)