Quick Definition
κοίμησις, εως, ἡ n.f. repose, taking rest
Strong's Definition
from 2837; sleeping, i.e. (by implication) repose
KJV Usage: taking of rest
UBS Dictionary of the Greek New Testament
noun, f. | -εως | κεῖμαι
23.66 · Physiological Processes and States · Sleep, Waking
to sleep, to be asleep, sleep the state of being asleep In some languages sleep is expressed by an idiom, for example, ‘his soul had wandered away’ or ‘his eyes had disappeared.’ Though an expression such as ‘his soul had wandered away’ might appear in some languages to have misleading theological implications, it really means only ‘to sleep.’
In JHN 11:13 κοίμησις is combined with ὕπνος apparently to stress the fact that the sleep was an ordinary or natural sleep.
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
κοίμησις, -ews, 7, α reposing, taking rest: Jn. xi. 13 [οἷς W. 8 59, 8a.]; of death, Sir. xlvi. 19; xlviii. 13; a lying, reclining, Plat. conv. p. 183 a.
Mounce Concise Greek Dictionary
κοίμησις koimēsis 1x
sleep; meton. rest, repose, Jn. 11:13*
Abbott-Smith Greek Lexicon
** κοίμησις, -εως, ἡ,
[in LXX: Si 46:19 48:13*;]
a reclining, resting: Jo 11:13.†
Moulton & Milligan — Vocabulary of the Greek NT
κοίμησις The thought is parallel with that of Ps 127°, when read as in RV marg., ‘‘so he giveth unto his beloved zy sleep.’’ See also OG/S 3832 (mid. i/B.c.) ἱεροθεσίου τοῦδε... ἐν Gu... σῶμα μορφῆς ἐμῆς. .. εἰς τὸν ἄπειρον αἰῶνα κοιμήσεται, and such Christian inscrr. as 7GS7 540] σὺν θεῷ... ἐκοιμήθη] ἡ δουλὴ τοῦ [θεοῦ] Σαβεῖνα, 24. 684 ἐκοιμήθη ἡ θεοκοίμητος Αἰγεία, and the striking inscr. of v/vi A.D. found on the Mount of Olives (Revue archéologtgue iv. 3 (1904), p. 141—cited by Radermacher G7. Ρ. 88)— ἐνθάδε κεῖται ἡ δούλη Kal νύμφη τοῦ Χριστοῦ Σοφία ἡ διάκονος ἡ δευτέρα Φοίβη, κοιμηθεῖσα ἐν εἰρήνῃ τῇ Κα τοῦ Μαρτίου μηνός κτλ. In contrast to this, for the general hopelessness of the pagan world in the presence of death, see such an inscr. as /GST 9298 κοιμᾶται τὸν αἰώνιον ὕπν(ον), 22. 187911 εὐψυχῶ.... ὅστις οὐκ ἤμην καὶ ἐγενόμην, οὐκ εἰμὶ καὶ οὐ λυποῦμαι, and the other citations in Zhess. p. 56. The active is found in the illiterate BGU III. 7758 (ii/A.p.) πρὸς δύο ἡμέρας ἐκύ(= ol)pyoa ἐκεῖ : cf. Gen 24", and for the form κοιμίζω, * cause to rest,’’ which is read here in δὲ, and which survives in MGr, cf. a fragment of an Anthology, P Tebt 1. 1135 (¢c. B.C. 100)— ἐρῶντος ψυχὴ καὶ λαμπάδιον ὑπ᾽ ἀνέμου ποτὲ μὲν ἀνήφθη ποτὲ δὲ πάλι κοιμίζεται. “Α lover's spirit, as a torch fanned by the wind, is now ablaze, and now again dies away” (Edd.). xol nats. This NT ἅπ. εἰρ. (Jn 111%) is used of ‘“‘rest in death”’ in Wiinsch 4/ 4* (iii/A.D.) ὁρκίζω σε τὸν θεὸν τὸν τὴν κοίμησίν σοι δεδωρημένον καὶ ἀπολύσαντά σε ἀπὸ δίεσμῶ)ν τοῦ βίου. See also the inscr. to a Roman Jew, cited by Schiirer Geschzch/e ii. p. 441, ἐν εἰρήνῃ ἡ κοίμησίς σου, and Pelagia-Legenden Ὁ. 1515 τὴν κοίμησιν τοῦ ἁγίου Iledaylov. For κοιμητήριον, ‘‘sleeping-place,” we may cite the early Syll 5894* (1st half iv/B.c.) ἐν δὲ Tot κοιμητηρίοι καθεύδειν χωρὶς μὲν τὸς ἄνδρας... . The word in the sense of “gyave’’ is often thought to be exclusively Christian, but Roberts-Gardner (p. 513) quote two Attic inscrr. where the accompanying figures of a seven-branched candelabrum seem to indicate Jewish origin. The first of these, C7G IV. 9313 (=/G III. 2, 3545) runs—Kowpntipioy Εἰὐτυχίας τῆς μητρὸς ᾿Αθηνέου Kt Θεονκτίστου. The Christian formula of dedicating τὸ κοιμητήριον ἕως ἀναστάσεως is seen at Thessalonica in 26. 9439, which Ramsay (C. and δ. ii. Ῥ. 495) dates about mid. iv/A.p.
Liddell-Scott-Jones — Greek-English Lexicon
κοίμησις (koimēsis) — sleep. κοίμ-ησις, εως, ἡ, lying down to sleep, κοιμήσεις ἐπὶ θύραις [NT+5th c.BC+]
II. the sleep of death, [LXX+3rd c.AD+]