Lexical Definition

‎ἔνδειξις‎ éndeixis (en'-dike-sis) demonstration ^G:N-F
from ‎ἐνδείκνυμι‎

declare, evident token, proof.

• indication (abstractly)

Abbott-Smith

* ἔν-δειξις, -εως, ἡ (< ἐνδείκνυμι),
a pointing out, showing forth, proof (v.s. ἔνδειγμα): Ro 3:25, 26, II Co 8:24, Phl 1:28.†

Abbott-Smith References

Liddell-Scott-Jones

ἔνδειξις, εως, ἡ,

indication, ἔνδειξιν τῷ λόγῳ ἐνδείκνυσθαι, opposed to ἐννοεῖν, [NT+5th c.BC+]

__2 as law-term, laying of information against one who discharged public functions for which he was legally disqualified, writ of indictment in such a case, [Refs 5th c.BC+]
__II demonstration, display of one's good will [Refs 4th c.BC+]
__III proof, demonstration, [Refs 6th c.AD+]

_{LSJ Scripture Refs: Rom.3.25}