Masih (pronounced [ˈmɑsiːħ]) is the Arabic word for Messiah. In modern Arabic it is used as one of the many titles of Isa (عيسى `Īsā), who is known to Christians as Jesus. Masih is used by Arab Christians as well as Muslims, and is written as Yasu' al-Masih (يسوع المسيح ) or Isa al-Masih.

The word Masih literally means "The anointed one"^{[citation needed]} and in Islam, Isa al-Masih is believed to have been anointed from birth by Alläh with the specific task of being a prophet and a king.^{[citation needed]} The Israelites, to whom Isa was sent, had a traditional practice of anointing their kings with oil. An Imam Bukhari Hadith describes Jesus as having wet hair that looked as if water was dripping from it, possibly meaning he was naturally anointed [1]. Muslims believe that this is just one of the many signs that proves that Jesus is the Messiah.

In Islam, Isa is believed to hold the task of killing the false messiah (al-Dajjal, a figure similar to the Antichrist in Christianity), who will emerge shortly before him during Qiyamah (Armageddon in Islamic belief). After he has destroyed al-Dajjal, his final task will be to become leader of the Muslims. Isa will unify the Muslim Ummah (the followers of Islam) under the common purpose of worshipping Allah alone in pure Islam, thereby ending divisions and deviations by adherents. Mainstream Muslims believe that at that time Isa will dispel Christian and Jewish claims about him.