Quick Definition
ὦ Ij. O, an exclamation
Strong's Definition
a primary interjection; as a sign of the vocative case, O; as a note of exclamation, oh
KJV Usage: O
UBS Dictionary of the Greek New Testament
intj.
91.14 · Discourse Markers · Marker of Direct Address
O a marker of direct address (functionally equivalent to the traditional vocative) Often left untranslated.
MAT 15:28 · MAT 17:17 · MRK 9:19 · LUK 9:41 · LUK 24:25 · ACT 1:1 · ACT 13:10 · ACT 18:14 · ACT 27:21 · ROM 2:1 · ROM 2:3 · ROM 9:20 · ROM 11:33 · GAL 3:1 · 1TI 6:11 · 1TI 6:20 · JAS 2:20
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Mounce Concise Greek Dictionary
ὦ ō 17x
O!, Mt. 15:28; Mk. 9:19; Acts 1:1; Rom. 2:1, 3; 11:33
Abbott-Smith Greek Lexicon
ὦ interj., c. vocat.,
O;
in simple address (less freq. than in cl.; M, Pr., 71); Ac 1:1 18:14 27:21, Ro 2:1, 3 9:20, I Ti 6:20; expressing reproof, Ja 2:20;
in exclamations of surprise, etc.: Mt 15:28, Lk 24:25, Ac 13:10, Ro 11:33, Ga 3:1; c. nom. (Bl., § 33, 4), Mt 17:17, Mk 9:19, Lk 9:41.†
Liddell-Scott-Jones — Greek-English Lexicon
ὦ (ō) — oh!. ὦ and ὤ, an exclamation, expressing surprise, joy, or pain, O! oh! with nominative, ὢ τάλας ἐγώ [Refs 5th c.BC+]: also with genitive, ὢ τῆς ἀναισχυντίας [Refs 2nd c.AD+]; with interrogative, ὤ, τί λέγει; [Refs]; in the middle of a sentence, [Refs 5th c.BC+]
II. with vocative, a mode of address, whether at the beginning of a sentence or in a parenthesis, ὦ Ἀχιλεῦ [Refs 8th c.BC+]; in invocations of the gods, ὦ Ζεῦ τε καὶ Γῆ καὶ πολισσοῦχοι θεοί [Refs 5th c.BC+]; ὦ πρὸς θεῶν ὕπεικε [Refs 4th c.BC+]: sometimes following the Verb, [Refs 5th c.BC+]; in different number from the vocative, προσέλθετ᾽, ὦ παῖ, πατρί [Refs 5th c.BC+]
II.2. with nominative instead of vocative, ὦ δῐος αἰθήρ, ὦ φίλος, [Refs 5th c.BC+]; also οὗτος, ὦ σέ τοι (i.e. καλῶ) [Refs 5th c.BC+]
II.3. with both together, φίλος ὦ Μενέλαε [Refs 8th c.BC+]
II.4. with the latter of two nouns, Ἀγάμεμνον, ὦ Μενέλαε [Refs].—In the first sense usually written ὤ, in the second ὦ: [τὸ ὢ] ἡνίκα θαυμαστικὸν λαμβάνεται βαρύνεται, καὶ χωρεῐ εἰς ἐπιρρηματικὴν σύνταξιν, οἷον ὢ Ἡρακλῆς [Refs] (ὦ,) expresses surprise (but [Refs 2nd c.AD+] seems to imply ὦ in both senses); ὤ as an exclamation is found in forms like{ὤ μοι}, ὤ μοι ἐγώ, ὢ πρὸς τῶν θεῶν [Refs 4th c.BC+] is improbable,compare [Refs 9th c.AD+]; ᾤμοι and ὤμοι are both recognized by [Refs 7th c.BC+]; written ὼ ώ in Papyrus of [Refs 5th c.BC+]. To those who (like [Refs 2nd c.BC+] for the vocative of the Article ὁ, [Refs 2nd c.AD+] replies at length.