Thayer's Greek Lexicon

 1. that which has been deemed right so as to have force of law
  1) what has been established, and ordained by law, an ordinance
  2) a judicial decision, sentence
1b1. of God
1b  1) either the favourable judgment by which he acquits
man and declares them acceptable to Him
1b  2) unfavourable: sentence of condemnation
2. a righteous act or deed