Quick Definition
I sleep, am sleeping
Strong's Definition
to lie down to rest, i.e. (by implication) to fall asleep (literally or figuratively)
Derivation: from G2596 (κατά) and (to sleep);
KJV Usage: (be a-)sleep
Thayer's Greek Lexicon
καθεύδω; imperfect 3 person plural ἐκάθευδον; from Homer down; the Sept. mostly for ωΘΡλΗα;
1. to fall asleep, to drop off to sleep: Mat_25:5.
2. to sleep;
a. properly: Mat_8:24; Mat_9:24 (on this and its parallels, cf. B. D. American edition, p. 1198{a} ); ; Mar_4:27; Mar_4:38; Mar_5:39; Mar_13:36; Mar_14:37; Mar_14:40; Luk_8:52; Luk_22:46; 1Th_5:7.
b. euphemistically, to be dead: 1Th_5:10; (Psa_87:6 (); Dan_12:2).
c. metaphorically, to yield to sloth and sin, and be indifferent to one's salvation: Eph_5:14; 1Th_5:6.
Mounce Concise Greek Dictionary
καθεύδω katheudō 22x
to sleep, be fast asleep, Mat_8:24 ; Mat_9:24 ;
met. to sleep in spiritual sloth, Eph_5:14 ; 1Th_5:6 ;
to sleep the sleep of death, to die, 1Th_5:10 sleep.
Abbott-Smith Greek Lexicon
καθεύδω ,
[in LXX chiefly for H7901 , Gen_28:13 , Psa_88:5 , al. ; also for H3462 , Son_5:2 , Da LXX TH Dan_12:2 , al. ; for H3427 , 1Sa_19:9 ;]
to sleep: Mat_8:24 ; Mat_9:24 ; Mat_13:25 ; Mat_25:5 ; Mat_26:46 ; Mat_26:43 ; Mat_26:45 , Mar_4:27 ; Mar_4:38 ; Mar_5:39 ; Mar_14:37 ; Mar_14:40-41 , Luk_8:52 ; Luk_22:46 , 1Th_5:7 . Metaph .,
(a) of death (as Ps, Da, ll . c .): 1Th_5:10 ( cf. Mat_9:24 , Mar_5:39 , Luk_8:52 , and v. Swete , Mk., l.c );
(b) of moral and spiritual insensibility: Mar_13:36 , Eph_5:14 , 1Th_5:6 .†
SYN.: (κοιμάω . G2837 )
Moulton & Milligan — Vocabulary of the Greek NT
καθεύδω [page 312]
BGU IV. 1141 .32 (B.C. 14) οὐδὲ γὰρ καθεύδωι ἔσωι ἵνα εἰδῶι , PSI I. 94 .17 (ii/A.D.) καθεύδει τῇ νυκτί . In the rules regulating visitors to a sacred shrine, Syll 589 .44 (iv/ B.C.), it is provided ἐν δὲ τοῖ κοιμητηρίοι καθεύδειν χωρὶς μὲν τὸς ἄνδρας , χωρὶς δὲ τὰς γυναῖκας . The compound ἐγκαθεύδω occurs several times in the same document. We may add Epict. ii. 20. 10 βαλὼν κάθευδε καὶ τὰ τοῦ σκώληκος ποίει , lie down and sleep and play the part of the worm. On the irregular construction in Mar_4:27 see Proleg. p. 185 f.
Liddell-Scott — Intermediate Greek Lexicon
καθεύδω ionic κατ-εύδω imperf. καθεῦδον attic also καθηῦδον and ἐκάθευδον fut. καθευδήσω "to lie down to sleep, sleep", Hom. , etc.:— ἐκ τοῦ καθεύδοντος (part. neut.) from "a sleeping state", Plat. metaph. "to lie asleep, lie idle", Aesch. , etc.:—also of things, "to sleep, lie still, be at rest", ἐλπίδες καθεύδουσιν Eur.
STEPBible — Tyndale Abridged Greek Lexicon
καθεύδω
[in LXX chiefly for שָׁכַב, Gen.28:13, Psa.88:5, al.; also for יָשֵׁן, Sng.5:2, Dan LXX TH Dan.12:2, al.; for יָשַׁב, 1Ki.19:9 ;]
to sleep: Mat.8:24 9:24 13:25 25:5 26:46, 43 26:45, Mrk.4:27, 38 5:39 14:37, 40-41, Luk.8:52 22:46, 1Th.5:7. Metaphorical,
__(a) of death (as Ps, Da, ll. with): 1Th.5:10 (cf. Mat.9:24, Mrk.5:39, Luk.8:52, and see Swete, Mk., l.with);
__(b) of moral and spiritual insensibility: Mrk.13:36, Eph.5:14, 1Th.5:6.†
SYN.: (κοιμάω.) (AS)