Lexical Definition

‎δικαιοσύνη‎ dikaiosýnē (dik-ah-yos-oo'-nay) righteousness ^G:N-F
from ‎δίκαιος‎

righteousness.

• equity (of character or act)
• specially (Christian) justification

Abbott-Smith

δικαιοσύνη, -ης, ἡ (< δίκαιος), [in LXX chiefly for צֶדֶק, and cognates, Ge 15:6, al., rarely for חֶסֶד, Ge 19:19 ;]
the character of ὁ δίκαιος (q.v.)
1. in broad sense, righteousness, conformity to the Divine will in purpose, thought and action: Mt 5:6, Jo 16:8, Ac 13:10, Ro 4:3; λόγος δικαιοσύνης, teaching of r., He 5:13; βασιλεὺς δ. (cf. FlJ, BJ, vi, 10, β. δίκαιος), He 7:2; ὅπλα δ., Ro 6:13; ὁδὸς δ., Mt 21:32; θώραξ τῆς δ., Eph 6:14; διὰκονοι δ., II Co 11:15; ὁσιότης καὶ δ., Lk 1:75, cf. Eph 4:24; ἀγαθωσύνῃ καὶ δ., Eph 5:9; δ. κ. εἰρήνη κ. χαρά, Ro 14:17; δ. κ. ἁγιασμός, I Co 1:30; opp. to ἁμαρτία, Ro 8:10; ἀνομία, II Co 6:14; άδικία, Ro 3:5; ποιεῖν τὴν δ., I Jo 2:29 3:7; id. as an inclusive term for the active duties of the religious life (ICC, in l.; Abbott, Essays, 73 ff), Mt 6:1; ἐργάζεσθαι δ., Ac 10:35; διώκειν δ., I Ti 6:11; πληροῦν πᾶσαν δ., Mt 3:15; ζῆν τῇ δ., I Pe 2:24; δ. θεοῦ, a righteousness divine in its character and origin, Mt 6:33, Ja 1:20, Ro (where it also includes the idea of God's personal r.; v. ICC, on 1:17) 1:17 3:5, 21-26 10:3, II Co 5:21, Phl 3:9; ἡ δ. τ. πίσιεως, Ro 4:11; ἡ ἐκ π. δ., Ro 9:30; ἡ κατὰ π. δ., He 11:7; opp. to this is ἡ ἐκ νόμου δ., Ro 10:5; ἡ δ. ἐν ν., Phl 3:6; ἡ ἰδία δ., Ro 10:3, cf. Phl 3:9
2. In narrower sense (cf. δίκαιος), justice: Ac 17:31, II Pe 1:1, Re 19:11 (DCG, ii, 529 ff.; Cremer, 190, 690).

Abbott-Smith References

Liddell-Scott-Jones

δικαιοσύνη-οσύνη, ἡ,

righteousness, justice, [LXX+6th c.BC+]; δ. δικαστική legal justice, [Refs 4th c.BC+]; opposed to ἐπιείκεια, [Refs]

__2 fulfilment of the Law, [LXX+NT]
__II justice, the business of a judge, [Refs 5th c.BC+]
__III Δ., personified, [Refs]
__IV [Refs 4th c.BC+] name for four, [Refs]
__V δικαιοσύνη· ἡ χοῖνιξ, μυστικῶς, [Refs 5th c.AD+]

_{LSJ Scripture Refs: LXX.Gen.15.6 ☩ LXX.Isa.26.2 ☩ Matt.3.15}