Lexical Definition

‎δικαίωμα‎ dikaíōma (dik-ah'-yo-mah) righteous act ^G:N-N
from ‎δικαιόω‎

judgment, justification, ordinance, righteousness.

• an equitable deed
• by implication, a statute or decision

Abbott-Smith

δικαίωμα, -τος, τ (< δικαιόω), [in LXX most freq. for חֹק, in Ez, chiefly for מִשְׁפָּט, in Pss, τὰ δ., freq. for פּׅקּוּדִים ;]
a concrete expression of righteousness, the expression and result of the act of δικαίωσις, "a declaration that a thing is δίκαιον, or that a person is δίκαιος," hence,
(a) an ordinance: δ. τ. θεοῦ, Ro 1:32; τ. κυρίου, Lk 1:6; τ. νόμου, Ro 2:26 8:4; λατρείας, He 9:1; σαρκός, He 9:10;
(b) a sentence: of acquittal, Ro 5:16 (also 5:18; ICC, in l.), or of condemnation;
(c) a righteous act: Ro 5:18 (RV), Re 15:4 19:8 (on the usage of π., v. MM, Exp., iii, xi).†

Abbott-Smith References

Liddell-Scott-Jones

δικαίωμα-ωμα, ατος, τό,

act of right, opposed to ἀδίκημα, [Refs 4th c.BC+]; duty, τὰ πρὸς ἀνθρώπους δ. [Refs 1st c.AD+]; properly amendment of a wrong, opposed to δικαιοπράγημα, [Refs 4th c.BC+]

__a judgement, penalty, [Refs 5th c.BC+]
__b justification, plea of right, [LXX+5th c.BC+]; δικαιώματα Ἑλληνίδων πόλεων, compiled by [Refs 4th c.BC+]
__c plural, pleadings, documents in a suit, [Refs 3rd c.BC+]; also, credentials, [Refs 2nd c.AD+]
__d act of δικαίὠσις [NT]
__II ordinance, decree, [LXX+NT]

_{LSJ Scripture Refs: LXX.2Kgs.19.28 ☩ Rom.5.16 ☩ LXX.Gen.26.5 ☩ LXX.Exod.15.26 ☩ Rom.1.32}