Quick Definition
ἔνδειγμα, ατος, τό n.n. a plain token, sign, proof
Strong's Definition
an indication (concretely)
Derivation: from G1731 (ἐνδείκνυμι);
KJV Usage: manifest token
UBS Dictionary of the Greek New Testament
noun, n. | -τος | δείκνυμι
1 As in the case of βέβαιος[c] (28.43), βέβαιοω[b] (28.43), and βεβαίωσις (28.44), there are two distinct sets of semantic features in the series ἔνδειξις, ἔνδειγμα, and ἀπόδειξις. The element of showing or demonstrating implies clearly making something known, but that which is made known is done in a clear, convincing, and confirming manner and therefore shown to be certain or true. This double set of semantic features is contained in such terms as proof, evidence and confirmation.
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
ἔν-δειγμα, -ros, τό, (ἐνδείκνυμι), token, evidence, proof, [A. V. manifest token]: 2 Th. i. 5 [ef. B. 153 (184)]. (Plat. Critias p. 110 b.; Dem. 423, 13.)
Mounce Concise Greek Dictionary
ἔνδειγμα endeigma 1x
a token, evidence, proof, 2 Thess. 1:5*
Abbott-Smith Greek Lexicon
* ἔν-δειγμα, -τος
(< ἐνδείκνυμι),
a plain token, proof: II Th 1:5 (cf. ἔνδειξις, which refers rather to the "act of proving"; ἔ., with the passive formation, to the thing proved, v. Lft., Notes, 100; M, Th., l.c.).†
SYN.: τεκμήριον
Liddell-Scott-Jones — Greek-English Lexicon
ἔνδειγμα (endeigma) — evidence. ἔνδειγμα, ατος, τό, (ἐνδείκνυμι) evidence, ὅτι.. [Refs 5th c.BC+]; token, εὐνοίας [Refs 4th c.BC+]