/ ˈsʊni; NAmE ; ˈsʌni/ noun ( pl. Sunni or Sun·nis )
1.
[ U ] one of the two main branches of the Islamic religion
—compare Shia
2.
[ C ] a member of the Sunni branch of Islam
—compare Shiite
► Sun·nite / ˈsʊnaɪt; NAmE ; ˈsʌn-/ adjective [ usually before noun ]
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WORD ORIGIN
Arabic , literally custom, normative rule .