The term "Hasan" refers to a **"sound" Hadith**. In the science of Hadith evaluation, which is used to assess the reliability of sayings, actions, or approvals attributed to the Prophet Muhammad, Hadiths are categorized based on their authenticity. The categories are determined by evaluating the chain of narrators, the content, and other factors.
A Hadith classified as "Hasan" is a sound Hadith that is somewhat less reliable than a "Sahih" Hadith, which is classified as authentic or genuine. A Hasan Hadith has a good chain of narrators and is free from major defects. It is used as evidence, but it is not quite as strong as a Sahih Hadith.
To summarize:
- A **Hasan** Hadith is considered **sound**.
- This means it is **reliable but not to the highest level of authenticity**, like a Sahih Hadith.