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Shia. definition: the branch of Islam whose members acknowledge Ali and his descendants as the rightful successors of Muhammad. significance: source of many debates, one of the largest Islamic denominations.
A Sunni is a member of the largest branch of Islam. A Sunni is a Muslim who believes that the caliph Abu Bakr was the rightful successor to Muhammad after his death. ... In Arabic, the word Sunni means "lawful," and its root can be found in Sunna, "the traditional teachings of Muhammad," or "way, course, or teachings."
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