Tafsir (Arabic: تفسير, romanized: tafsīr [tafˈsiːr]; English: explanation) refers to an exegesis, or commentary, of the Quran. An author of a tafsir is a mufassir (Arabic: مُفسّر; plural: Arabic: مفسّرون, romanized: mufassirūn). A Quranic tafsir attempts to provide elucidation, explanation, interpretation, context or commentary for clear understanding and conviction of God's will in Islam. The idea of the interpretation of the Quran first appears in the Quran itself, commenting on cases where it is clear and others where it is ambiguous (3:7).
Principally, a tafsir deals with the issues of linguistics, jurisprudence, and theology. In terms of perspective and approach, tafsir can be broadly divided into two main categories, namely tafsir bi-al-ma'thur (lit. received tafsir), which is transmitted from the early days of Islam through the Islamic prophet Muhammad and his companions, and tafsir bi-al-ra'y (lit. tafsir by opinion), which is arrived through personal reflection or independent rational thinking.