What does righteous mean in Greek?

There isn't one single perfect translation for "righteous" from English into Greek, as the nuance of the word can vary depending on the context. However, several Greek words could be used, each with slightly different connotations:

* δίκαιος (dikaios): This is probably the closest and most common translation. It refers to being just, fair, and upright according to law or divine standards. It emphasizes conformity to moral and legal principles.

* ἀγαθός (agathos): This means "good" but can also imply moral goodness and righteousness. It has a broader sense than *dikaios*, encompassing a wider range of virtuous qualities.

* ὅσιος (hosios): This word implies holiness and piety, often in a religious context. It suggests reverence and devotion to God and adherence to religious laws.

The best choice depends on the specific meaning of "righteous" in the sentence. If you can provide the sentence where you encountered the word "righteous," a more precise translation can be offered.