Quick Definition
σήμερον Adv today, now
Strong's Definition
on the (i.e. this) day (or night current or just passed); generally, now (i.e. at present, hitherto)
Derivation: neuter (as adverb) of a presumed compound of the article G3588 (ὁ) (t changed to s) and G2250 (ἡμέρα);
KJV Usage: this (to-)day
UBS Dictionary of the Greek New Testament
advb. | ἡμέρα
67.205 · Time · Units of Time with Reference to Other Units or Points of Time: Yesterday, Today, Next Day
today the same day as the day of a discourse
MAT 6:11 · MAT 6:30 · MAT 11:23 · MAT 16:3 · MAT 21:28 · MAT 27:8 · MAT 27:19 · MAT 28:15 · MRK 14:30 · LUK 2:11 · LUK 4:21 · LUK 5:26 · LUK 12:28 · LUK 13:32 · LUK 13:33 · LUK 19:5 · LUK 19:9 · LUK 22:34 · LUK 22:61 · LUK 23:43 · ACT 4:9 · ACT 13:33 · ACT 19:40 · ACT 20:26 · ACT 22:3 · ACT 24:21 · ACT 26:2 · ACT 26:29 · ACT 27:33 · ROM 11:8 · 2CO 3:14 · 2CO 3:15 · HEB 1:5 · HEB 3:7 · HEB 3:13 · HEB 3:15 · HEB 4:7 · HEB 4:7 · HEB 5:5 · HEB 13:8 · JAS 4:13
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
Mounce Concise Greek Dictionary
σήμερον sēmeron 41x
today, this day, Mt. 6:11, 30; 16:3; 21:28; now, at present, Heb. 13:8; 2 Cor. 3:15; ἡ σήμερον, i.e. ἡμέρα, sometimes expressed, this day, the present day, Acts 20:26; ἕως or ἄχρι τῆς σήμερον, until this day, until our times, Mt. 11:23; 27:8
Abbott-Smith Greek Lexicon
σήμερον (Att.. τήμερον), adv.,
[in LXX for הַיּוֺם ;]
to-day: Mt 6:11, Lk 4:21, Ac 4:9, al.; opp. to αὔριον, Mt 6:30, Lk 12:28, Ja 4:13; χθὲς καὶ σ. καὶ εἰς τοὺς αἰῶνας, He 13:8; ἡ σ. ἡμέρα, Ac 20:26; ἕως (ἄχρι) τῆς σ. ἡμέρας, Ro 11:8, II Co 3:14; μέχρι (ἕως) τῆς σ. (sc. ἡμέρας), Mt 11:23 27:8; as subst., τὸ σ., He 3:13; id. in appos., ὁρίζει ἡμέραν, σ., He 4:7 R, mg., (v. Westc., in l.).
Moulton & Milligan — Vocabulary of the Greek NT
σήμερον. This Ionic form for Attic τήμερον, ““ἴτο-ἄαν,᾽ may be illustrated by P Hib I. 6518 (c. B.c. 265) οὐκ ἐξέσται σοι σήμερ[ον pet |petv, P Oxy VIII. 11538 (i/A.D.) σήμερον ya[p] παρεγένετο, ‘for he was here to-day,” P Fay 123" (c. A.D. 100) εἴρηχεν ἡμῖν σήμερον, and P Oxy IX. 12168 (ii/iii A.D.) ἐνιαυτὸς σήμερον ἐκτὸς σοῦ εἰμί, ‘a year to-day I have been away from you” (Ed.). The word is used more loosely in 76. VIL. 10633 (ii/iii A.D.) σήμερον ὅτε ἔδωκά σοι ὀνόματα τρία. . . TH ἑξῆς ἐμ[ο]ῦ σου πυθομένου, “the other day when I gave you three nanies . . the next day when I asked you” (Ed.): cf. Mt 2715. For 4 σήμερον used asa subst. without ἡμέρα, as in Mt 1178 a@/., cf. BGU IT. 5895 (ii/a.p.)
Liddell-Scott-Jones — Greek-English Lexicon
σήμερον (sēmeron) — today. σήμερον, adverb to-day, [NT+8th c.BC+]; Doric dialect σάμερον [ᾱ] [Refs 5th c.BC+]; Attic dialect τήμερον [Refs 5th c.BC+] is sometimes found in Comedy texts, [Refs 5th c.BC+]; εἰς τ. [Refs 5th c.BC+]; τὸ τ. εἶναι to-day, [Refs 4th c.BC+]; also in the form τήμερα [Refs 5th c.BC+]. (Prob. from κyᾱμερον, containing stem [kcirc]yo- 'this', cf. Lithuanian šis 'this', Latin ci-tra: σήμερον (τήμερον) is to ἡμέρα as σῆτες (τῆτες) to ἔτος.)