Lexical Definition

‎ἔκδικος‎ ékdikos (ek'-dik-os) avenging G:A
from ‎ἐκ‎ and ‎δίκη‎

a (re-)venger.

Usage: 1 form in 2 verses
Form Translated As     In Verse(s)
ἔκδικοσ an avenger Rom.13.4
avenging 1Thess.4.6

Abbott-Smith

** ἔκδικος, -ον (< δίκη), [in LXX: Wi 12:12, Si 30:6, IV Mac 15:29 * ;]
1. without law, unjust.
2. exacting penalty from; as subst., an avenger: Ro 13:4; seq. περί, I Th 4:6 (in π., a legal representative; Milligan, Th., l.c.).†

Abbott-Smith References

Book Refs
Romans 13:4
1 Thessalonians 4:6

Liddell-Scott-Jones

ἔκδικος-ος, ον,

lawless, unjust, ἔκδικα πάσχω [Refs 4th c.BC+]; of persons, [Refs 5th c.BC+]. adverb -κως[Refs 4th c.BC+]

__II maintaining the right, avenging, ἔχει θεὸς . ὄμμα [LXX+1st c.AD+]
__II.2 substantive, avenger, [Refs 1st c.AD+]
__II.3 public advocate or prosecutor, [Refs 1st c.BC+]
__II.4 generally, legal representative, [Refs 1st c.AD+]