Quick Definition
I awake out of sleep, am thoroughly awake
Strong's Definition
to waken thoroughly
Derivation: from G1223 (διά) and G1127 (γρηγορεύω);
KJV Usage: be awake
Thayer's Greek Lexicon
διαγρηγορέω, διαγρηγόρω: 1 aorist διεγρηγόρησα; to watch through, (Herodian, 3, 4, 8 (4, Bekker edition) πάσης τῆς νυκτός ... διαγρηγορήσαντες, Niceph. Greg. Hist. Byz., p. 205 f. and 571 a.); to remain awake: Luk_9:32 (for they had overcome the force of sleep, with which they were weighed down, βεβαρημένοι ὕπνῳ); (others (e. g., R. V. text) to be fully awake, cf. Niceph. as above, p. 205 f. δόξαν ἀπεβαλομην ὥσπερ οἱ διαγρηγορήσαντες τά ἐν τοῖς ὑπνοῖς ὀνειρατα; Winer's De verb. comp. etc. Part v., p. 11f).
Mounce Concise Greek Dictionary
διαγρηγορέω diagrēgoreō 1x
to remain awake; to wake thoroughly, Luk_9:32
Abbott-Smith Greek Lexicon
*† δια -γρηγορέω , -ῶ ,
(a) prop ., to remain awake ( R , mg .);
(b) to be fully awake ( R , txt .): Luk_9:32 .†
STEPBible — Tyndale Abridged Greek Lexicon
δια-γρηγορέω, -ῶ
__(a) prop., to remain awake (R, mg.);
__(b) to be fully awake (R, txt.): Luk.9:32.†
(AS)