Lexical Definition

‎σημεῖον‎ sēmeîon (say-mi'-on) sign ^G:N-N
neuter of a presumed derivative of the base of ‎σημαίνω‎

miracle, sign, token, wonder.

• an indication, especially ceremonially or supernaturally

Abbott-Smith

σημεῖον, -ου, τό [in LXX chiefly for אוֹת ;]
a sign, mark, token;
(a) of that which distinguishes a person or thing from others: Mt 26:48, Lk 2:12, II Th 3:17 (cf. Deiss., LAE, 1532); seq. gen. epexeg., Ro 4:11; c. gen. obj., Mt 24:8, 30, II Co 12:12; c. gen. subj., Mt 16:3;
(b) a sign of warning or admonition: Mt 12:39 16:4, Lk 2:34 11:29, 30, I Co 14:22;
(c) a sign portending future events (Soph., Plat. al.): Mk 13:4, Lk 21:7, 11, 25, Ac 2:19, Re 12:1, 3 15:1;
(d) of miracles and wonders (MM, xxii), regarded as signs of a divine authority: Mt 12:38, 39 16:1, 4, Mk 8:11, 12 Lk 11:16, 29 23:8, Jo 2:11, 18, 23 4:54 6:30 10:41 12:18, Ac 4:16, 22; pl., 17, 20], Jo 2:11, 23 3:2 6:2, 14, 26 7:31 9:16 11:47 12:37 20:30, Ac 8:6, I Co 1:22 (Lft., Notes, 162); the same ascribed to false teachers and demons: Mt 24:24, Mk 13:22, II Th 2:9, Re 13:13, 14 16:14 19:20; σ. καὶ τέρατα (τ. καὶ σ.; cf. Tr., Syn., § xci), Mt 24:24, Mk 13:22, Jo 4:48, Ac 2:19, 43 4:30 5:12 6:8 7:36 14:3 15:12, Ro 15:19, II Th 2:9; id. seq. καὶ δυνάμεις, II Co 12:12, He 2:4; σ. καὶ δυνάμεις, Ac 8:13; δ. καὶ τ. καὶ σ., Ac 2:22; σ. διδόναι, Mt 24:24, Mk 13:22.†

Abbott-Smith References

Liddell-Scott-Jones

σημεῖον, τό,

Ionic dialect σημήϊον, Doric dialect σᾱμήϊον [Refs 4th c.BC+], σᾱμεῖον [Refs 2nd c.BC+], σᾱμᾶον [Refs] —= σῆμα in all senses, and more common in Prose, but never in [Refs 8th c.BC+]: mark by which a thing is known, [Refs 5th c.BC+]; sign of the future, τυραννίδος σ. [Refs 5th c.BC+]; trace, track, σημεῖα δ᾽ οὔτε θηρὸς οὔτε του κυνῶν.. ἐξεφαίνετο [Refs 5th c.BC+]; of a cork on a buoy, [Refs 2nd c.AD+]

__b Doric dialect, tomb, [Refs 4th c.BC+]
__2 sign from the gods, omen, [Refs 5th c.BC+]; wonder, portent, [LXX+2nd c.BC+]; especially of the constellations, regarded as signs, δύεται σημεῖα [Refs 5th c.BC+]
__3 sign or signal to do a thing, made by flags, ἀνέδεξε σημήϊον τοῖσι ἄλλοισι ἀνάγεσθαι he made signal for the rest to put to sea, [Refs 5th c.BC+]; signal for battle, τὰ σ. ἤρθη, κατεσπάσθη, [Refs 5th c.BC+]; καθαιρεῖν τὸ σ. to take it down, strike the flag, as a sign of dissolving an assembly, [Refs 5th c.BC+]; τὸ τῆς ἐκκλησίας σ. [Refs 5th c.BC+]; ὕστερος ἐλθεῖν τοῦ σ. [Refs]: generally, signal, σ. ὑποδηλῶσαί τινι ὅτι.. [Refs 5th c.BC+]; signal to commence work, [ἡ] τοῦ σημείου ἄρσις [Refs]; σημείῳ ἀβαστάκτῳ, σημείοις ἀβαστάκτοις with unremoved signal (s), of gymnasia, i.e. never closed, [Refs 2nd c.AD+]
__4 standard or flag, on the admiral's ship, [Refs 5th c.BC+]; on the general's tent, [Refs 5th c.BC+]; ἔξω τῶν σ. out of the lines, [Refs]
__4.b body of troops under one standard or flag, [Refs 2nd c.BC+]
__5 landmark, boundary, limit, ἔξω τῶν σ. τοῦ ὑμετέρου ἐμπορίου out of the limits of your commercial port, [Refs 4th c.BC+]; of milestones, [Refs 1st c.AD+]
__6 device upon a shield, [Refs 5th c.BC+]; upon ships, figure-head, [Refs 5th c.BC+]
__7 signet on ring, etc., [Refs 5th c.BC+]; figure, image, Διὸς κτησίου [Refs 3rd c.BC+]; badge, τρίαιναν σ. θεοῦ [Refs 4th c.BC+]: plural, written characters, γράψαι σημήϊα.. φωνῆς [Refs]
__7.b plural (Doric dialect) σαμεῖα, stripes, [Refs 1st c.BC+]; clavi· σημεῖα, [Refs]
__8 watchword, war-cry, [Refs 5th c.BC+]
__9 birthmark or distinguishing feature, Wilcken [Refs 2nd c.AD+]
__II sign, token, indication of anything that is or is to be, [NT+5th c.BC+]
__II.2 in reasoning, a sign or proof, [Refs 5th c.BC+]; ὅτι ἀγαθὸς ἦν.., τοῦτο μέγιστον σ. [Refs]; τὸ μὴ ἐκδυθῆναι οὐδὲν σ. ἐστι is no proof to the contrary, [Refs 5th c.BC+]; also, instance, example, [Refs 5th c.BC+]; σημεῖον δέ· to introduce an argument, [Refs 5th c.BC+]
__II.3 in the Logic of [Refs 4th c.BC+], a sign used as a probable argument in proof of a conclusion, opposed to τεκμήριον (a demonstrative or certain proof), [Refs]
__II.3.b in Stoic and Epicurean philosophical, sign as observable basis of inference to the unobserved or unobservable, [Refs 4th c.BC+]; περὶ σημείων (uncertain meaning), title of work by Zeno, [Refs]
__II.4 in Medicine texts, symptom, [Refs 5th c.BC+]
__II.4.b = Latin lenticula, a kind of skin-eruption, [Refs 1st c.AD+]
__II.5 plural, shorthand symbols, [Refs 1st c.AD+]
__II.6 critical mark, [Refs 3rd c.AD+]
__III ={στιγμή}, mathematical point, [Refs 4th c.BC+]; also ς. (with or without χρόνου) point of time, instant, [Refs 4th c.BC+]
__III.2 in Prosody and Music, unit of time, [Refs 3rd c.AD+]

_{LSJ Scripture Refs: LXX.Exod.4.8 ☩ Matt.24.24 ☩ John.4.48 ☩ Luke.21.11 ☩ Matt.16.3}