Quick Definition
adragonorhugeserpent
Strong's Definition
a fabulous kind of serpent (perhaps as supposed to fascinate)
Derivation: probably from an alternate form of (to look);
KJV Usage: dragon
Thayer's Greek Lexicon
δράκων, δράκοντος, ὁ (apparently from δέρκομαι, 2 aorist ἔδρακον; hence, δράκων, properly, equivalent to ὀξύ βλέπων (Etym. Magn. 286, 7; cf. Curtius, § 13)); the Sept. chiefly for ϊΘΜπΔΜιο; a dragon, a great serpent, a fabulous animal (so as early as Homer, Iliad 2, 308f, etc.). From it, after Gen_3:1 ff, is derived the figurative description of the devil in Rev_12:3-17; Rev_13:2; Rev_13:4; Rev_13:11; Rev_16:13; Rev_20:2. (Cf. Baudissin, Studien zur semitisch. Religionsgesch. vol. i. (iv. 4), p. 281ff.)
Mounce Concise Greek Dictionary
δράκων drakōn 13x
a dragon or large serpent; met. the devil or Satan, Rev_12:3-4 ; Rev_12:7 ; Rev_12:9 ; Rev_12:13 ; Rev_12:16-17 ; Rev_13:2 ; Rev_13:4 ; Rev_13:11 ; Rev_16:13 ; Rev_20:2 dragon.
Abbott-Smith Greek Lexicon
δράκων , -ο τος , ὁ ,
[in LXX chiefly for H8577 ;]
a dragon, a mythical monster: fig ., of Satan, Rev_12:3-17 ; Rev_13:2 ; Rev_13:4 ; Rev_13:11 ; Rev_16:13 ; Rev_20:2 .†
Moulton & Milligan — Vocabulary of the Greek NT
δράκων [page 170]
δράκων is common in the magic papyri, e.g. P Leid W ii. 5 (ii/iii A.D.) δράκοντα δάκνοντα τὴ ( l. τὴν ) οὐράν , so x. 28 , ib. V iii. 16 (iii/iv A.D.) δράκων εἶ πτεροειδής , P Lond 121 .586 (iii/A.D.) (= I. p. 102) ὁ δράκων οὐροβόρος , ib. .781 , and PSI I. 28 .4 (? iii/iv A.D.), 29 .9 (? iv/A.D.). In P Oxy III. 490 .12 (A.D. 124) one of the witnesses to a will records that ἔστιν μου ἡ σφ [ραγὶς ] δρακόμορφος : the edd. correct to δρακοντόμορφος , but in view of the common MGr δράκος , the bogey of many a folk-story, it seems better to assume the short form as genuine. It is one of many anticipations of MGr in a simplified word-formation.
In a Christian amulet, Kaibel 1140 b. .3 , Satan is addressed as μ [ί ]ασμα , δράκων , θη [ρῶν λ ]όχε , κτλ .
Liddell-Scott — Intermediate Greek Lexicon
δράκων δρά^κων, οντος, ὁ, (n dra^k wn_ontos masc ) [Etym: δρα^κεῖν] "a dragon", or "serpent" of huge size, "a python", Hom. , etc.
STEPBible — Tyndale Abridged Greek Lexicon
δράκων, -ο τος, ὁ
[in LXX chiefly for תַּנִּין ;]
a dragon, a mythical monster: figuratively, of Satan, Rev.12:3-17 13:2, 4 13:11 16:13 20:2.†
(AS)