Lexical Definition

‎οὖν‎ oûn (oon) therefore/then ^G:CONJ
apparently a primary word

and (so, truly), but, now (then), so (likewise then), then, therefore, verily, wherefore.

• (adverbially) certainly, or (conjunctionally) accordingly

Abbott-Smith

οὖν, particle expressing consequence or simple sequence (never standing first in a sentence),
wherefore, therefore, then: Mt 3:10, Lk 3:9, Jo 8:38, Ac 1:21, Ro 5:9, al.; in exhortations, Mt 3:8, Lk 11:35, Ac 3:19, Ro 6:12, al.; in questions, Mt 13:28, Mk 15:12, 5], Ro 6:1, al.; continuing a narrative or resuming it after a digression, Mt 1:17, Lk 3:18, Jo 1:22 2:18 (and very freq. in this Gospel), Ac 26:22, al.; ἄρα οὖν (v.s. ἄρα); ἐπεὶ οὖν, He 2:14; οὖν c. ptcp. (= ἐπεὶ οὖν), Ac 2:30, Ro 5:1, al.; ἐὰν οὖν (where οὖν rather in sense belongs to the apodosis), Mt 5:23, Lk 4:7, Jo 6:62, Ro 2:26, al.; ὡς οὖν, Jo 4:1, al.

Abbott-Smith References

Liddell-Scott-Jones

οὖν,

Ionic dialect and Doric dialect ὦν (the latter in [οὖν in 8th c.BC: Homerus Epicus (see. below), 5th c.BC: Bacchylides Lyricus 18.29,37, 3rd c.BC: Cercidas Iambographus 4.18, +others)">Refs 8th c.BC+], adverb certainly, in fact, confirming something, frequently in contrast with something which is not confirmed, in [Refs 8th c.BC+] only in combination with γε (see. γοῦν), γάρ, οὔτε or μήτε, ὡς, ἐπεί, μέν, etc.:

__1 really, φημὶ γὰρ οὖν κατανεῦσαι.. Κρονίωνα for I declare that Zeus did really promise.., [Refs 8th c.BC+]; τόφρα γὰρ οὖν ἑπόμεσθα.., ὄφρ᾽ for we followed them up to the very point, where.., [οὖν τις ἀκτὶς ἡλίου νιν ἱστορεῖ.. ζῶντα 4th-5th c.BC: Aeschylus Tragicus “Agamemnon” 676, compare 1042 ">Refs 8th c.BC+]; ἐλέχθησαν λόγοι ἄπιστοι μὲν ἐνίοισι Ἑλλήνων, ἐλέχθησαν δ᾽ ὦν but they really were spoken, [Refs 5th c.BC+]; Θηβαῖοι μὲν ταῦτα λέγουσι.., Πλαταιῆς δ᾽ οὐχ ὁμολογοῦσι.., ἐκ δ᾽ οὖν τῆς γῆς ἀνεχώρησαν at all events they did return, [οὖν [prev. author] “Lg.” 699b ">Refs 5th c.BC+]; so δ᾽ οὖν after a parenthesis; εἰ δή τις ὑμῶν οὕτως ἔχει,—οὐκ ἀξιῶ μὲν γὰρ ἔγωγε,—εἰ δ᾽ οὖν but if he is so, [Refs 5th c.BC+]; so ἀλλ᾽ οὖν.. γε but at all events, [Refs 5th c.BC+]; ἔμπης οὖν ἐπιμεῖναι ἐς αὔριον to stay nevertheless at least till to-morrow, [Refs 8th c.BC+]; οὖν concessive, I grant you, τάχ᾽ οὖν τις ἄκων ἔσχε [οὖν τὸ πρῶτον ἀνέκραγον but now that I have (emphatic) once spoken up, 8th c.BC: Odyssea Homerus Epicus “Odyssey” 14.467, compare 17.226, 8th c.BC: Ilias Homerus Epicus “Illiad” 18.333 ">Refs 8th c.BC+]; Τληπόλεμος δ᾽, ἐπεὶ οὖν τράφ᾽ ἐνὶ μεγάρῳ εὐπήκτῳ, αὐτίκα.. κατέκτα when once, i.e. as soon as, he had grown up, [Refs]; νεβροί, αἵ τ᾽ ἐπεὶ οὖν ἔκαμον.. ἑστᾶσ᾽ which, as soon as they are tired, stand still, [Refs]; to indicate that something foreshadowed has actually occurred, ἀγορήνδε καλέσσατο λαὸν Ἀχιλλεύς.., οἱ δ᾽ ἐπεὶ οὖν ἤγερθεν [οὖν after ἐπεί or ὡς has either no force or approaches signification 11 or 111, οἱ δ᾽ ἐπεὶ οὖν παύσαντο πόνου 8th c.BC: Odyssea Homerus Epicus “Odyssey” 16.478, compare 19.213, 251, +others">Refs 8th c.BC+]; τὸν δ᾽ ὡς οὖν ἐνόησε [Refs 8th c.BC+]; οὔτ᾽ οὖν.., οὔτε.. or οὔτε.., οὔτ᾽ οὖν.. both = neither.. nor, but preferred according as the first or second clause is to be marked by emphasis,[Refs 8th c.BC+]; so εἰ.., εἴτ᾽ οὖν.. if.., or if.., [Refs 5th c.BC+]; εἴτ᾽ οὖν, εἴτε μὴ γενήσεται whether it shall be so, or no, [Refs 5th c.BC+]; ξεῖνος αἴτ᾽ ὦν ἀστός, i.e. αἴτε ξ. αἴτ᾽ ὦν ἀ., [οὖν ἀληθὲς εἴτ᾽ οὖν ψεῦδος 5th-6th c.BC: Plato Philosophus “Apologia” 34e, compare 4th-5th c.BC: Aeschylus Tragicus “Choephori” 683: so also in parenth. Relat. clauses, ἢ σῖγ᾽, ἀτίμως, ὥσπερ οὖν ἀπώλετο πατήρ">Refs 5th c.BC+] even as, just as, [Refs 5th c.BC+]; εἰ δ᾽ ἔστιν, ὥσπερ οὖν ἔστι, θεός if he is, as he in fact is, a god, [οὖν οὐκ οἶδα, οὐδὲ οἴομαι [prev. author] “Ap.” 21d: for γὰρ οὖν, see at {γάρ} 4th-5th c.BC: Aeschylus Tragicus 11.5">Refs 5th c.BC+]; for μὲν οὖν, see at {μέν} [Refs 5th c.BC+]
__2 added to indefinite Prons. and adverbs, like Latin cunque, ὅστις whoever, ὁστισοῦν whosoever; ὅπως how, ὁπωσοῦν howsoever; ἄλλος ὁστισοῦν another, be he who he may; so ὁποιοσοῦν, ὁποιοστισοῦν, ὁποσοσοῦν, ὁπωσδηποτοῦν, ὁπητιοῦν, ὁποθενοῦν, etc., (see entry).
__II to continue a narrative, so, then, καὶ τὰ μὲν οὖν.. θῆκαν [Refs 8th c.BC+]; ὅτ᾽ οὖν since, then,.., [Refs 5th c.BC+]; ζεῖ οὖν ἐν τούτῳ.. [οὖν ὁ Κῦρος εἶπεν 5th-6th c.BC: Xenophon Historicus “Institutio Cyri (Cyropaedia)” 4.1.22: in 5th c.BC: Herodotus Historicus and \_Attic dialect\_, μὲν οὖν (which see)">Refs 5th c.BC+] is very common in this sense; so δ᾽ οὖν [Refs 5th c.BC+]; οὖν is also used alone merely to resume after a parenthesis or long protasis, well, as I was saying, ὦ Λακεδαιμόνιοι, χρήσαντος τοῦ θεοῦ.., ὑμεας γὰρ πυνθάνομαι προεστάναι..,—ὑμέας ὦν.. προσκαλέομαι.. [Refs 5th c.BC+]
__II.2 ὦν is frequently inserted by [Refs 5th c.BC+]participle, οἱ δὲ φέροντες ἐς τὴν ἀγορήν, ἀπ᾽ ὦν ἔδοντο[Refs]; so in [οὖν ἐφθάρησαν “Morb.” 1.14 (variant), +others; also ἐπ᾽ ὦν ἐπίομες οἶνον 5th c.BC: Epicharmus Comicus 124.3 ">Refs 5th c.BC+]: this tmesis is rare in Attic dialect, ὥστε γε καὐτόν σε κατ᾽ οὖν ἔβαλεν [Refs 5th c.BC+]; but occurs in later writers, Dorieus cited in [Refs 3rd c.BC+]
__III in inferences, then, therefore, not in [Refs 8th c.BC+]; in a statement, [Refs]; very common from [Refs 5th c.BC+] downwards; so καὶ σὺ οὖν you too therefore, [οὖν [prev. author] “An.” 1.9.8 ">Refs 5th c.BC+]; compare οὐ γὰρ οὖν, τοιγαροῦν: strengthened, δὴ οὖν [οὖν δή [prev. author] “R.” 340e ">Refs 5th c.BC+]: in questions, τίς οὖν ὁ λύσων σ᾽ ἐστίν ; [Refs 5th c.BC+], etc.; ἆρ᾽ οὖν δή ; [Refs 5th c.BC+]; τί οὖν δή ; [Refs 5th c.BC+]