Quṭub, Qutb, or Kutb (Arabic: قطب) is a Muslim Sufi word for the highest form of master. In Arabic it literally means "pivot, hub, or axis." The Qutub is the shaykh who provides a focus for spiritual teachings.  Other terms include Pir and Sarkar.
According to the Institute of Ismaili Studies (Ismailism is a branch of the Shīˤa sect of Islam), "In mystical literature, such as the writings of al–Tirmidhi, Abd al–Razzaq and Ibn al–‘Arabi (d. 1240), [Qutb or Kutb] refers to the most perfect human being (al–insan al–kamil) who is thought to be the universal leader of all saints, to mediate between the divine and the human and whose presence is deemed necessary for the existence of the world."
The state of a quṭub is quṭubiyyah.