Tajdid ( Larabci: تجديد‎ ) kalma ce ta larabci wacce take nufin " sabuntawa ". Yawancin lokaci ana haɗa shi tare da ɗin don ma'anar "sabunta addini ." Magana makamancin haka amma mafi ƙarancin magana ita ce ihya 'al-din ( إحياء الدين ), wanda za'a iya fassara shi da "rayar da addini." Dalilin tajdid (sabuntawa ko farkawa) shine aiwatar da wannan kyakkyawan ƙirar a rayuwar musulmai, a duk inda kuma a duk lokacin da al'ummar musulmin suka wanzu. Wannan dalilin yana nuna cewa tajdid shine ci gaba da ƙoƙarin musulmai koyaushe don bayyana musulinci da sanya shi aiki a ci gaba da canza yanayi ba tare da keta manufofinsa ba . Ra'ayin tajdid a cikin al'adar musulinci ana iya komawa ga annabi Muhammad, wanda ya ce "A farkon kowane karni za a samu a cikin wannan al'ummar (al'ummar musulmin) wadanda za su yi kira da a sabunta addini". Irin wadannan mutane ( mujaddadi, ko kuma masu sabunta addinin Musulunci ), ana jin cewa koyaushe suna zuwa ne a lokacin da al'umar Musulmai za su kauce daga hanyar gaskiya da Alkur'ani da sunna suka bayyana (misalin Annabi).