Strong's Greek #827 - αὐγή, ῆς, ἡ augé (brightness)

break of day.

Of uncertain derivation; a ray of light, i.e. (by implication) radiance, dawn -- break of day.

Strong's 827: αὐγή

αὐγή, αὐγῆς, ἡ, brightness, radiance (cf. German Auge (eye), of which the tragic poets sometimes use αὐγή, see Pape (or Liddell and Scott; cf. Latinlumina)), especially of the sun; hence, ἡλίου is often added (Homer and following), daylight; hence, ἄχρις (ἄχρι T Tr WH) αὐγῆς even till break of day, Acts 20:11 (Polyaen. 4, 18, p. 386 κατά τήν πρώτην αὐγήν τῆς ἡμέρας). (Synonym: see φέγγος, at the end.)

Strong's Greek: 827. αὐγή (augé) — 1 Occurrence

Acts 20:11 - N-GFS
GRK: ὁμιλήσας ἄχρι αὐγῆς οὕτως ἐξῆλθεν
NAS: until daybreak, and then
KJV: even till break of day, so
INT: having talked until daybreak so he departed