Lexical Definition

‎μέγας‎ mégas (meg'-as) great ^G:A
(including the prolonged forms, feminine , plural , etc.; compare also ‎μέγιστος‎, ‎μείζων‎)

(+ fear) exceedingly, great(-est), high, large, loud, mighty, + (be) sore (afraid), strong, X to years.

• big (literally or figuratively, in a very wide application)

Abbott-Smith

μέγας, μεγάλη, μέγα, [in LXX chiefly for גָּדוֹל, also for רַב, מַרְבֶּה (incl. μείζων), רֹב (μέγιστος);]
great;
1. of external form, bodily size, measure, extent: λίθος, Mt 2:60; δράκων, Re 12:3; ἰχθῦς, Jo 21:11; πόλις, Re 11:8; μάχαιρα, Re 6:4, al.
2. Of intensity and degree: δύναμις, Ac 4:33; φόβος, Mk 4:41; ἀγάπη, Jo 15:13; ἄνεμος, Jo 6:18; κραυγή, Ac 23:9; φῶς, Mt 4:16; πυρετός, Lk 4:38; θλίψις, Mt 24:21.
3. Of rank;
(a) of persons: θεός (MM, xvi), Tit 2:13; Ἄρτεμις, Ac 19:27; compar. (v. infr.), Mt 18:1 (cf. Dalman, Words, 113 f.); neut. for masc. (Bl., §32, 1), Mt 12:6;
(b) of things: ἁμαρτία, Jo 19:11; μυστήριον, Eph 5:32; = μεγίστη (v. infr., and cf. Field, Notes, 16 f.), Mt 22:36; compar. for superl. (M, Pr., 78), I Co 13:13.
4.
(a) Compar., μείζων: Mt 11:11 23:17, al.; neut. pl., μείζονα, contr. μείζω, Jo 1:51; double compar., μειζότερος (M, Pr., 236; Bl., § 11, 4), III Jo 4;
(b) superl., μέγιστος (Deiss., BS, 365), II Pe 1:4.

Abbott-Smith References

Liddell-Scott-Jones

μέγας, μεγάλη [ᾰ], μέγα [ᾰ],

genitive μεγάλου, ης, ου, dative μεγάλῳ, ῃ, ῳ, accusative μέγᾰν, μεγάλην, μέγα [ᾰ]; dual μεγάλω, α, w; plural μεγάλοι, μεγάλαι, μεγάλα, etc.: the stem μεγάλο- is never used in singular nominative and accusative masculine and neuter, and only once in vocative masculine,

__A ὦ μεγάλε Ζεῦ [Refs 4th c.BC+]
__A.I big, of bodily size: frequently of stature, εἶδος.. μ. ἦν ὁράασθαι [Refs 8th c.BC+]; φῶτα μέγαν καὶ καλόν[Refs 5th c.BC+]; φύσιν τίν᾽ εἶχε φράζ; Answ. μέγας [Refs 5th c.BC+]
__A.I.b full-grown, of age as shown by stature, νῦν δ᾽ ὅτε δὴ μ. εἰμί [Refs 8th c.BC+]; later, elder of two persons of the same name, Wilcken [Refs 3rd c.BC+]; Σκιπίων ὁ μ. [Refs 2nd c.BC+]
__A.I.c of animals, μ. ἵπποι, βοῦς, σῦς, [Refs 8th c.BC+]
__A.I.2 generally, vast, high, οὐρανός, ὄρος, πύργος, [Refs 8th c.BC+]; wide, πέλαγος, λαῖτμα θαλάσσης, [Refs 8th c.BC+]; long, ἠϊών, αἰγιαλός, [Refs 8th c.BC+]; but usually opposed to μικρός or σμικρός, πρὸς ἑαυτὸ ἕκαστον καὶ μ. καὶ σμικρόν [Refs 5th c.BC+]
__A.II of quality or degree, great, mighty, frequently epithet of gods, ὁ μ. Ζεύς [Refs 4th c.BC+]; μεγάλα θεά, of Demeter and Persephone, [Refs 5th c.BC+]; θεοὶ μεγάλοι, of the Cabiri, [Refs]; Μήτηρ μ., of Cybele, [Refs 3rd c.BC+]; Μήτηρ θεῶν μ. [Refs]; Ἴσιδος μ. μητρὸς θεῶν [Refs 2nd c.BC+]; μ. ἡ Ἄρτεμις Ἐφεσίων [NT]; τίς θεὸς μ. ὡς ὁ θεὸς ἡμῶ; [LXX+NT]; of men, μ. ἠδὲ κραταιός [Refs 8th c.BC+]; μέγας ηὐξήθη rose to greatness, [Refs 4th c.BC+], i. e. the King of Persia, [Refs 5th c.BC+]; as a title of special monarchs, Ἀρδιαῖος ὁ μ. [Refs 5th c.BC+]
__A.II.2 strong, of the elements, etc., ἄνεμος, λαῖλαψ, Ζέφυρος, [Refs 8th c.BC+]; of properties, passions, qualities, feelings, etc., of men, θάρσος, πένθος, ποθή, etc.,[NT+8th c.BC+]; ἡ μ. νοῦσος epilepsy, [Refs 5th c.BC+]
__A.II.3 of sounds, great, loud, ἀλαλητός, ἰαχή, πάταγος, ὀρυμαγδός, [Refs 8th c.BC+]; θόρυβοι, κωκυτός, [Refs 5th c.BC+]
__A.II.4 generally, great, mighty, ὅρκος [Refs 8th c.BC+]; ὄλβος, τιμά, [Refs 5th c.BC+]; μ. λόγος, μῦθος, a great story, rumour, [Refs 5th c.BC+]; ἐρώτημα a big, i. e. difficult, question, [Refs 5th c.BC+]; weighty, important, τόδε μεῖζον [Refs 8th c.BC+]; μέγα ποιέεσθαί τι to esteem of great importance, [Refs 5th c.BC+]; οὐκ ἂν εἴη παρὰ μέγα τὸ δικολογεῖν not of great importance, [Refs 5th c.BC+]; τὸ δὲ μέγιστον and what is most important, [Refs 5th c.BC+]; οἱ μέγιστοι καιροί the most pressing emergencies, [Refs 4th c.BC+]; μ. ὠνησάμενοι χρημάτων for large sums, [Refs 2nd c.BC+]
__A.II.5 with a bad sense, over-great, μέγα εἰπεῖν to speak big, and so provoke divine wrath, [Refs 8th c.BC+]; ἔπος μ., μ. λόγοι, [Refs 5th c.BC+]; μηδὲν μέγ᾽ εἴπῃς [Refs 5th c.BC+]; μεγάλα, μεῖζον ἢ δικαίως πνεῖν, [Refs 5th c.BC+]
__A.II.6 of style. impressive, [Refs 4th c.BC+]; μεῖζον more striking, [Refs]
__A.II.7 of days, long, [Refs 2nd c.AD+]
__B adverb μεγάλως [ᾰ] greatly, mightily, [Refs 8th c.BC+]
__B.II more frequently neuter singular μέγα as adverb, very much, exceedingly, μ. χαῖρε all hail!, see l. for μάλα in [Refs 8th c.BC+]; especially with Verbs expressing strong feeling, μ. κεν κεχαροίατο [Refs 8th c.BC+]; or those expressing sound, loudly, μ. ἰάχειν, ἀῧσαι, βοῆσαι, εὔξασθαι, ἀμβῶσαι, [Refs 8th c.BC+]; μ. αὐδήσαντος, μ. ἤπυεν, [Refs 8th c.BC+]: also in plural, μεγάλα.. δυστυχεῖς [Refs]
__B.II.2 of Space, far, μέγα προθορών [Refs 8th c.BC+]; ἄνευθε μέγα far away,[Refs 5th c.BC+]
__B.II.3 with adjectives, as μέγ᾽ ἔξοχος, μέγα νήπιος, [Refs 8th c.BC+]; μ. νήπιε Oracle texts cited in [Refs 5th c.BC+]: with comparative and superlative, by far, μέγ᾽ ἀμείνονες, ἄριστος, φέρτατος, [Refs 8th c.BC+]
__C degrees of Comparison (regular μεγαλώτερος, -ώτατος late, [Refs]
__C.1 comparative μείζων, ον, genitive ονος, Epic dialect, Attic dialect (also Delph., [Refs 4th c.BC+]; Ionic dialect, [Refs 4th c.AD+], Doric dialect, Aeolic dialect μέζων, ον, [Refs 5th c.BC+] (also early Attic dialect, [Refs]; dative plural μεζόνεσσι [Refs 7th c.BC+]: compare μέττον· μεῖζον, [NT+5th c.AD+] (used as title, elder, [Refs 6th c.AD+]; μειζονώτερος [Refs 4th c.BC+]:—greater, longer, taller, [Refs 8th c.BC+]; frequently also, too great, γέρας [Refs 5th c.BC+]; Μηνόφιλος μείζων M. the elder, [Refs 2nd c.AD+]; as title, μειζων κώμης headman of a village, [Refs 4th c.AD+], etc.: generally, the higher authority, [Refs 3rd c.AD+]; οὔτε μεῖζον οὔτε ἔλαττον, a strong form of denial, nothing whatever, [Refs 5th c.BC+]. adverb μειζόνως [Refs 5th c.BC+]; Ionic dialect μεζόνως [Refs 5th c.BC+]: neuter as adverb, μεῖζον σθένειν [Refs 5th c.BC+]
__C.2 superlative μέγιστος, η, ον, [Refs 8th c.BC+]: neuter as adverb, μέγιστον ἴσχυσε [Refs 5th c.BC+]; δυνάμενος μ., with genitive, [Refs 5th c.BC+]: with another superlative, μέγιστον ἐχθίστη [Refs 5th c.BC+]; ἐς μέγιστον[Refs 5th c.BC+]:—late superlative μεγιστότατος [Refs 1st c.AD+]. (Cf. Sanskrit majmán- 'greatness', Latin magnus, Gothic mikils 'great'.)

_{LSJ Scripture Refs: Acts.19.28 ☩ LXX.Ps.76.13* ☩ Titus.2.13 ☩ Luke.4.38}