Free from sin or guilt. / Moral and virtuous, to the point of sanctimonious. / Justified morally. / (slang, US) Awesome; great.

To make righteous; specifically, to justify religiously, to absolve from sin.

Piously self-assured and smugly moralistic.

(State of Israel) A non-Jew who risked his or her life during the Holocaust to save Jews from extermination by the Nazis.

(State of Israel) Title given to a non-Jew who risked his or her life during the Holocaust to save Jews from extermination by the Nazis.

In a righteous manner.

Confidence in one's own righteousness, self-assurance, smug.

In a self-righteous manner.

(uncountable) The quality or state of being righteous. / (uncountable, theology) Holiness; conformity of life to the divine law. / (countable) A righteous act, or righteous quality.

plural of righteousness