Quick Definition
μεσιτεύω v. I mediate, interpose
Strong's Definition
to interpose (as arbiter), i.e (by implication) to ratify (as surety)
Derivation: from G3316 (μεσίτης);
KJV Usage: confirm
UBS Dictionary of the Greek New Testament
verb | μεσόω
31.21 · Hold a View, Believe, Trust · Agree, Consent
to bring about an agreement, to cause an agreement to bring about a mutually accepted agreement between two or more parties, with the probable additional component of making something certain Since one who was a μεσίτης (31.22) often acted as one who provided the surety or guarantee of an agreement or arrangement, there is a significant component of certainty involved in μεσιτεύω. Hence, one may understand this as implying not only the agreement but the guarantee of its validity.
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
μεσιτεύω: 1 aor. ἐμεσίτευσα; (μεσίτης [cf. W. p. 25 e.]); 1. to act as mediator, between litigating or covenanting parties; trans. to accomplish something by interposing between two parties, to mediate, (with ace. of the result): τὴν διάλυσιν, Polyb. 11, 34, 3; τὰς συνθήκας, Diod. 19,71; Dion. Hal. 9, 59; [ef. Philo de plant. Noé, ii. 2 fin.]. 2. as a μεσίτης is a sponsor or surety (Joseph. antt. 4, 6, 7 ταῦτα ὀμνύντες €Xeyor καὶ τὸν θεὸν μεσίτην ὧν ὑπισχνοῦντο ποιούμενοι [cf. Philo de spec. lege. iii. 7 ἀοράτῳ δὲ πράγματι πάντως ἀόρατος μεσιτεύει θεός etc. }), 50 μεσιτεύω comes to signify to pledge one’s self, give surely: ὅρκῳ, Heb. vi. 17.
Mounce Concise Greek Dictionary
μεσιτεύω mesiteuō 1x
to perform offices between two parties; to intervene, interpose, Heb. 6:17*
Abbott-Smith Greek Lexicon
* μεσιτεύω
(< μεσίτης),
to interpose, mediate: ὅρκῳ, He 6:17 (MM, ii, iii).†
Moulton & Milligan — Vocabulary of the Greek NT
μεσιτεύω. To the literary exx. of this verb (from Aristotle downwards) we may add such occurrences in the Kown as BGU III. 9067 (A.D. 34-5) μεσιτεύοντας ἑτέροις καὶ παραχωροῦντας, 7. 70918 (time of Antoninus Pius) τὰ ἐξ αὐτῶν περιγινόμενα ἀποφερομένους καὶ μεσιτεύοντας, CPR 1. 1° (A.D. 83-4) μεσειτεύοντας καὶ παραχωροῦντας ἑτέροις, and 26. 20613. Cf. from the inscrr. OG/S 43778 (i/B.C.) γενομένου κλήρου ἀπὸ [τῆς μεσ]ιτευούσης τὰς συνθήκας πόλεως, 16. 7° πρὸς τὸν μεσιτεύοντα δῆμον. For the verb μεσιδιόω see P Rein 72% (B.c. 141?) ἐμεσιδίωσεν τὸ προειρημένον χειρόγραφον Ilerex ay, cf. 33 τὸ μεμεσιδιωμένον χειρόγρ(αφον).
Liddell-Scott-Jones — Greek-English Lexicon
μεσιτεύω (mesiteuō) — to guarantee. μεσῑτ-εύω, act as arbiter or mediator, [Refs 1st c.AD+]; τισι [Refs 1st c.AD+]; μ. ὅρκῳ [NT]; act as go-between, τῇ Πασιφάῃ πρὸς τὸν ἔρωτα τοῦ ταύρου [Refs]
2. transitive, mediate, negotiate, τὴν διάλυσιν μ. [Refs 2nd c.BC+]
3. pledge, mortgage property, [Refs 1st c.AD+]
4. [Refs 1st c.AD+]
5. add as a third constituent, χάλκανθον[Refs 5th c.BC+]
II. intransitive, τὰ χρήματα μ. lies on deposit with a stakeholder, [Refs 2nd c.BC+]
II.2. lie between, μονάδος καὶ δεκάδος [Refs]