What is meant by His saying, the Most High, "and those who guard their chastity," and does it refer to a woman who has not had a relationship outside the framework of marriage?

The word "al-hasin" is applied to a chaste woman, as mentioned by Al-Tabari and Ibn Manzur, who cited the verse by Al-Ajjaj: "And a chaste woman from among chaste, smooth ones far from harm and from engaging in evil." Chaste women may also be referred to in revelation texts as "muhsanat" or "guardians of their private parts."