noun

• (uncountable) The quality or state of being righteous.
  "But in these days of fanaticism, that harsh and violent spirit is abroad, when men clothe their own angry passions in the garb of righteousness, and call persecution vindicating the honour of God."
• (uncountable, theology) Holiness; conformity of life to the divine law.
  "21 ¶ I hate, I despise your feast dayes, and I will not smell in your solemne assemblies. 22 Though ye offer me burnt offerings, and your meat offerings, I will not accept them: neither will I regard the peace offerings of your fat beasts. 23 Take thou away from mee the noise of thy songs: for I will not heare the melodie of thy violes. 24 But let iudgement run downe as waters, and righteousnesse as a mightie streame."
• (countable, now rare) A righteous act or quality.
  "All our righteousnesses are as filthy rags."
• (theology) The state of being right with God; justification; the work of Christ, which is the ground justification.
  "There are two kinds of Christian righteousness: the one without us, which we have by imputation; the other in us, which consisteth of faith, hope, and charity, and other Christian virtues."