Who is a Caliph?

The word meaning is vice regent. Man is caliph of Lord Almighty on earth. In Islam it applies to the religious, spiritual and temporal vice regent of the Last Prophet of Allah (All-Pure and Exalted), may Peace and Blessings be upon him. In mystic circles it is a person who has Permission by a Shaikh to take the task of Purification (tazkiya) and Correction (islah) of others . For caliph the Urdu word is khalifa.