Sunna (pia sunnah, kutoka Kiarabu : سنة, neno linalomaanisha "mila", "mapokeo" au "njia". ) Kwa Waislamu, Sunnah inamaanisha "njia ya mtume Muhammad". Wasomi Waislamu wanajifunza juu ya Sunna kwa kusoma hadithi elfu kadhaa juu ya Muhammad, familia yake, na wafuasi wake wa kwanza. Haditho hizi zinaitwa Hadith. Jina la dhehebu kubwa katika Uislamu ni Wasunni, nalo limetokana na neno sunna, kwa maana ni waumini wanaolenga kufuata sunna ya mtume wao. Juynboll, G.H.A. (1997). "Sunna". In P. Bearman; Th. Bianquis; C.E. Bosworth; E. van Donzel; W.P. Heinrichs (eds.). Encyclopaedia of Islam. 9 (2nd ed.). Brill. pp. 878–879. Qazi, M.A.; El-Dabbas, Mohammed Saʿid (1979). A Concise Dictionary of Islamic Terms. Lahore, Pakistan: Kazi Publications. p. 65. The Sunna as Primordiality by Sheikh Abdal Hakim Murad The Meaning of "Sunna" in the Qur’an, Qur'anic Studies Sunnah and Hadith, Center For Muslim–Jewish Engagement Legislative Authority of Sunnah Archived 2 Oktoba 2019 at the Wayback Machine.