Meaning distortion, corruption, alteration. The vast majority of today's Muslims assume the Taurat and Injil have been corrupted, but the Qur'an never says the physical scriptures of the previous revelations were corrupted, only their interpretations. Many early and contemporary Muslim scholars (e.g. Ibn ‘Abbas, Ibn al-Layth, Ibn Rabban, Ibn Qutayba, Al-Ya'qubi, Al-Tabari, Al-Baqillani, Al-Mas'udi,) agree with the conclusion.