Mullah is derived from the Arabic term “mawla,” which means “master.” The title is used mostly in Iran and in the Shia regions of Lebanon, Syria, and Iraq. In Turkey, Afghanistan, Pakistan, and Central Asia, it is used by both Sunnis and Shiites to refer to an Islamic teacher or scholar, or the leader of a mosque. Outside of these areas, the term is not widely used.
In central and south Asia, mullahs have also been military leaders and conquerors. But today “mullah” is generally understood to refer to local learned Islamic leaders. Mullahs are expected to be knowledgeable in the Quran, Hadith, and Sharia law. They often teach in mosque schools, called madrassas, and also lead prayers. The term is also used as a sign of respect for any educated Muslim religious man.