Sufism (Arabic: الصوفية‎, romanized: al-Ṣūfiyya or Arabic: التصوف‎, romanized: al-Taṣawwuf) is a mystic body of religious practice found within Islam which is characterized by a focus on Islamic purification, spirituality, ritualism, and asceticism.

Practitioners of Sufism are referred to as “Sufis” (from صُوفِيّ, ṣūfīy), and historically typically belonged to “orders” known as tariqa (pl. ṭuruq) — congregations formed around a grand wali (saint) who would be the last in a chain of successive teachers linking back to Muhammad, with the goal of undergoing tazkiya (self purification) and the hope of reaching the spiritual station of ihsan. The ultimate aim of Sufis is to seek the pleasure of God by endeavoring to return to their original state of purity and natural disposition, known as fitra.

Sufism emerged early on in Islamic history, partly as a reaction against the expansion of the early Umayyad Caliphate (661–750) and mainly under the tutelage of Hasan al-Basri. Although Sufis were opposed to dry legalism, they strictly observed Islamic law and belonged to various schools of Islamic jurisprudence and theology.^[7] Although the overwhelming majority of Sufis, both pre-modern and modern, remain adherents of Sunni Islam. Important focuses of Sufi worship include Zhikr, the practice of remembrance of God. Sufis also played an important role in spreading Islam through their missionary and educational activities.

The Arabic word tasawwuf (lit. ‘‘Sufism’‘), generally translated as Sufism, is commonly defined by Western authors as Islamic mysticism. The Arabic term Sufi has been used in Islamic literature with a wide range of meanings, by both proponents and opponents of Sufism. Classical Sufi texts, which stressed certain teachings and practices of the Quran and the sunnah (exemplary teachings and practices of the Islamic prophet Muhammad), gave definitions of tasawwuf that described ethical and spiritual goals and functioned as teaching tools for their attainment. Many other terms that described particular spiritual qualities and roles were used instead in more practical contexts.

Some modern scholars have used other definitions of Sufism such as “intensification of Islamic faith and practice” and “process of realizing ethical and spiritual ideals”

The original meaning of ṣūfī seems to have been “one who wears wool (ṣūf)”, and the Encyclopaedia of Islam calls other etymological hypotheses “untenable”. Woolen clothes were traditionally associated with ascetics and mystics. Al-Qushayri and Ibn Khaldun both rejected all possibilities other than ṣūf on linguistic grounds.

Another explanation traces the lexical root of the word to ṣafā (صفاء), which in Arabic means “purity”, and in this context another similar idea of tasawwuf as considered in Islam is tazkiyah (تزكية, meaning: self-purification), which is also widely used in Sufism. These two explanations were combined by the Sufi al-Rudhabari (d. 322 AH), who said, “The Sufi is the one who wears wool on top of purity.”

Others have suggested that the word comes from the term Ahl al-Ṣuffa (“the people of the suffah” or the bench), who were a group of impoverished companions of Muhammad who held regular gatherings of dhikr. One of the most prominent companions among them was Abu Hurayra. These men and women who sat at the Prophet’s Mosque are considered by some to be the first Sufis.