Quick Definition
αὐγή, ῆς, ἡ n.f. light of day
Strong's Definition
of uncertain derivation; a ray of light, i.e. (by implication) radiance, dawn
KJV Usage: break of day
UBS Dictionary of the Greek New Testament
noun, f. | -ῆς | αὐγάζω
67.73 · Time · A Point of Time with Reference to Units of Time: Daybreak, Midday, Midnight, Late
daybreak, sunrise, dawn the point of time when the day begins
1 There may be slight differences of meaning between αὐγή and ὄρθρος[b] in that αὐγή focuses primarily upon light and ὄρθρος[b] perhaps on the early part of dawn, but this cannot be determined precisely from existing contexts.
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
αὐγή, -ῆς, ἡ, brightness, radiance, (cf. Germ. Auge [eye], of which the tragic poets sometimes use αὐγή, see Pape for L. and S.; ef. Lat. dumina]), especially of the sun; hence ἡλίου is often added (Hom. and sqq.), daylight; hence ἄχρις [-ρι T Tr WH] αὐγῆς even till break of day, Acts xx. 11 (Polyaen. 4, 18 p. 386 κατὰ τὴν πρώτην αὐγὴν τῆς ἡμέρας). [SYN. see φέγγος. fin.]
Mounce Concise Greek Dictionary
αὐγή augē 1x
radiance; daybreak, dawn, Acts 20:11*
Abbott-Smith Greek Lexicon
αὐγή, -ῆς, ἡ,
[in LXX: Is 59:9 (נְגֹהָה), II Mac 12:9*;]
brightness
Later (as in MGr.; MM, s.v.), daylight, dawn: Ac 20:11 (Cremer, 118).†
SYN.: φέγγος (v. Thayer, s. φ.; DB, iii, 44a; Tr., Syn., § xlvi).
Moulton & Milligan — Vocabulary of the Greek NT
αὐγή. The choice of this word as a proper name in Egypt is witnessed by Prezsigke 1995, 1999, 2003, 2006, 2008, from a set of sepulchral inscrr. of Alexandria. This is a better warrant of vernacular use than the fulsome laudation with which the Cyzicenes greeted the first acts of Gaius (A.D. 37), Syll 365%, ἐπεὶ 6 νέος Ἥλιος Datos (κτλ.) συναναλάμψαι ταῖς ἰδίαις αὐγαῖς καὶ τὰς δορυφόρους τῆς ἡγεμονίας ἠθέλησεν βασιλήας, 7. 6. surrounded himself with satellites in the shape of vassal kings restored to thrones from which Tiberius expelled them (Dittenberger). Αὐγή is the MGr for “dawn,” and probably superseded the irregular noun ἕως very early in the Kow history: Ac 201} ἄχρι αὐγῆς is thus good vernacular. So P Leid W*+* ἐφάνη φῶς, αὐγή (cf. iv.99), Cf. also the dimin. αὐγοῦλα in ΔΊΟΥ, as in the Klepht ballad (Abbott, Sozgs p. 26)— Κ᾽ ἐκεῖ πρὸς τὰ Xapdypara, κ᾽ ἐκεῖ πρὸς τὴν αὐγοῦλα, And there, towards daybreak, towards early morn. v Αὐγουστος
Liddell-Scott-Jones — Greek-English Lexicon
αὐγή (augē) — daybreak. αὐγή, ἡ, light of the sun, and in plural, rays, beams, πέπτατο δ᾽ αὐ. ἠελίου[Refs 8th c.BC+]; ἠελίου ἴδεν αὐγάς, i. e. was born, [Refs 8th c.BC+]; ὑπ᾽ αὐγὰς ἠελίοιο, i.e. still alive, [Refs 8th c.BC+]; αὐγὰς ἐσιδεῖν see the light, i.e. to be alive, [Refs 6th c.BC+]; ὑπ᾽ αὐγὰς λεύσσειν or ἰδεῖν τι hold up to the light and look at, [Refs 5th c.BC+] in a full and in a side light, [Refs 5th c.BC+]; δυθμαὶ αὐγῶν sun-set, [Refs 5th c.BC+]; ξύνορθρον αὐγαῖς dawning with the sun, [Refs 4th c.BC+]; κλύζειν πρὸς αὐγάς rise surging towards the sun, [Refs]; λαμπροτάτη τῶν παρεουσέων αὐγέων brightest light available, [Refs 5th c.BC+] 'life's setting sun', [Refs 4th c.BC+]
2. αὐγαὶ ἠελίοιο or αὐγαί alone, the East, [Refs 2nd c.AD+]
3. dawn, day-break, [NT]
4. generally, any bright light, πυρὸς αὐγή[Refs 8th c.BC+]; ἀρίζηλοι δέ οἱ αὐγαί, of lightning,[Refs 5th c.BC+]; of a beacon, [Refs 8th c.BC+]; distinguished from φλόξ, [Refs 3rd c.BC+]
5. of the eyes, ὀμμάτων αὐγαί[Refs 5th c.BC+]; αὐγαί alone, the eyes, [Refs 5th c.BC+]
6. gleam, sheen, of bright objects, αὐ. χαλκείη[Refs 8th c.BC+]; of gems, [Refs 4th c.BC+], chiefly in the sense of sunlight.