Quick Definition
a wonder, portent
Strong's Definition
a prodigy or omen
Derivation: of uncertain affinity;
KJV Usage: wonder
Thayer's Greek Lexicon
τέρας, genitive τερατος, pl. τέρατα (cf. κέρας, at the beginning), τό (apparently akin to the verb τερρέω; accordingly something so strange as to cause it to be 'watehed' or 'observed'; (others connect it with ἀστήρ, ἀστραπή, etc., hence, 'a sign in the heavens'; Vanicek, p. 1146; Curtius, § 205); see Fritzsche, Ep. ad Romans iii., p. 270), from Homer down, the Sept. for ξετΕϊ, a prodigy, portent; miracle (A. V. wonder) performed by anyone; in the N. T. it is found only in the plural and joined with σημεῖα; for the passages see σημεῖον, p. 574{a}.
Mounce Concise Greek Dictionary
τέρας teras 16x
a prodigy, portent, Act_2:19 ;
a signal act, wonder, miracle, Mat_13:22 ; Joh_4:48 ; Act_2:43 miracle; wonders.
Abbott-Smith Greek Lexicon
τέρας , -ατος , τό ,
[in LXX chiefly for H4159 ;]
a wonder, marvel: in NT always pl ., τ . κ . σημεῖα , Mat_24:24 , al. ( see σημεῖον ).
Moulton & Milligan — Vocabulary of the Greek NT
τέρας [page 631]
For τέρας in its NT sense of wonder, portent, we may cite Vett. Val. p. 341 .14 ἐὰν δέ πως τὸ δωδεκατημόριον εἰς θηριῶδες ἐκπέσῃ ἢ τὸ τούτῳ διάμετρον ἢ οἱ τούτων κύριοι , τέρας ἢ ἄλογον ζῷον ἀποφαίνεσθαι . For MGr τέρατο , miracle, see Thumb Handb . § 105, n .1 .
Liddell-Scott — Intermediate Greek Lexicon
τέρας "a sign, wonder, marvel", Lat. portentum, prodigium, Hom. ; esp. of signs in heaven, Il. (cf. τεῖρος), etc. in concrete sense, "a monster", Διὸς τ. αἰγιόχοιο, of the Gorgon's head, id=Il. ; of a serpent, id=Il. ; of Typhoeus, Aesch. ; of Cerberus, Soph.
STEPBible — Tyndale Abridged Greek Lexicon
τέρας, -ατος, τό
[in LXX chiefly for מוֹפֵת ;]
a wonder, marvel: in NT always pl., τ. κ. σημεῖα, Mat.24:24, al. (see: σημεῖον)
(AS)