Lexical Definition

‎μήν‎ mḗn (mane) certainly G:PRT
a stronger form of ‎μέν‎

+ surely.

Usage: 2 forms in 14 verses
Form Translated As     In Verse(s)
μὴν surely Heb.6.14
μην But however LXX.Job.17.10
But in fact LXX.Job.2.5 • LXX.Job.21.17 • LXX.Job.33.1 • LXX.Job.34.36
But let not however LXX.Job.12.5
But nevertheless LXX.Job.13.3
No rather LXX.Job.27.7
in fact LXX.Esth.9.27 • LXX.Job.13.15 • LXX.Job.32.21
nevertheless LXX.Job.5.8
shall certainly not LXX.Job.14.12

Abbott-Smith

μήν, a particle of assurance,
verily, truly; εἰ (εἶ) μ. (= cl., ἦ μ. in LXX and π.), now verily, full surely: He 6:14(LXX).†

Abbott-Smith References

Book Refs
Hebrews 6:14

Liddell-Scott-Jones

μήν,

Doric dialect [Refs 5th c.BC+], Aeolic dialect [Refs 7th c.BC+], and old Epic dialect μάν (in Hom.always followed by a vowel except [μήν">Refs 8th c.BC+] is followed by a consonant except in [Refs 8th c.BC+]; original μάν has probably been changed to μέν except when the metre prevented), a Particle used to strengthen asseverations, verily, truly; a synonym of μέν but stronger, and like it always following the word which begins the clause, ὧδε γὰρ ἐξερέω, καὶ μ. τετελεσμένον ἔσται and so verily.., [Refs 8th c.BC+]; ἴστε μὰν.. ye know doubtless, [Refs 5th c.BC+] on then, [Refs 8th c.BC+]

__II after other Particles,
__II.1 ἦ μήν, now verily, full surely, ἦ μὴν καὶ πόνος ἐστίν [Refs 8th c.BC+]: strengthened, ἦ δὴ μάν [Refs 8th c.BC+]: frequently later in strong protestations or oaths, with infinitive, ὄμνυσι δ᾽ ἦ μὴν λαπάξειν [Refs 5th c.BC+]: in Prose also to begin an independent clause, ὀμνύω.., ἦ μ. ἐγὼ ἐθυόμην [Refs 5th c.BC+]
__II.2 καὶ μήν, sometimes simply to add an asseveration, see entry [near the start],[Refs 5th c.BC+]: frequently to introduce something new or deserving special attention, καὶ μὴν Τάνταλον εἰσεῖδον [Refs 8th c.BC+]; especially in dramatic Poets to mark the entrance of a person on the stage, here comes.., [Refs 5th c.BC+], etc.; of new facts, and besides, nay more, καὶ μήν.. γε [Refs 5th c.BC+]; in Orators to introduce new arguments, καὶ μήν.. γε [Refs 5th c.BC+]; to introduce a counter-argument, [Refs 5th c.BC+] well, I allow it, [Refs 5th c.BC+]; μὴ νῦν διάτριβ᾽, ἀλλ᾽ ἄνυε πράττων.. Answ. καὶ μ. βαδίζω [Refs 5th c.BC+]
__II.3 ἀλλὰ μήν, yet truly, [μήν.. γε [prev. author] “Ra.” 258 ">Refs 5th c.BC+]; to allege something not disputed, [Refs 5th c.BC+]; ἀλλ᾽ οὐδ᾽ ἐγὼ μ... [Refs 5th c.BC+]
__II.4 ναὶ μήν, above all, [Refs 5th c.BC+]
__II.5 οὐ μήν, of a truth not, [Refs 8th c.BC+]; μὴ μάν (Attic dialect μὴ μήν) oh do not, [Refs], etc.; ἀλλ᾽ οὐ μάν [Refs 5th c.BC+]
__II.6 ὡς μήν, = {ἦ μήν}, ὀμμνύω Δία.. ὡς μ. κρινεῖν τὰ ἀντιλεγόμενα [Refs]
__III after interrogatives, τί μ.; well, what of it? [Refs 5th c.BC+]; τί μ. οὔ well, why not? [Refs 5th c.BC+]; τῶς μ.; well, but how.. ? [Refs 5th c.BC+]; to express surprise, [Refs 5th c.BC+]; ἀλλὰ πότε μή; [Refs 5th c.BC+]
__IV with adversative force, especially after a negative, so that it is equivalent to μέντοι, νῦν ἐμὲ μὲν στυγέει.., ἔσται μὰν ὅτ᾽ ἄν.. [Refs 8th c.BC+]; ἀνάγκη μὲν καὶ ταῦτ᾽ ἐπίστασθαι.., οὐδὲν μ. κωλύει κτλ. [Refs 5th c.BC+]; expressed more strongly by γε μ., [Refs 5th c.BC+]; οὐδὲ μ.[Refs]; οὐ μ. οὐδέ nor yet indeed, [Refs 8th c.BC+]