Allah ( A(H)L-ə, ə-LAH; Arabic: الله, IPA: [ɑɫˈɫɑːh] ) is an Arabic term for God, specifically the God of Abraham. Outside of the Middle East, it is principally associated with Islam (in which it is also considered the proper name), although the term was used in pre-Islamic Arabia and continues to be used today by Arabic-speaking adherents of any of the Abrahamic religions, including Judaism and Christianity. It is thought to be derived by contraction from al-ilāh (الاله, lit. 'the god') and is linguistically related to God's names in other Semitic languages, such as Aramaic (ܐܲܠܵܗܵܐ ʼAlāhā) and Hebrew (אֱלוֹהַּ ʾĔlōah).

The word "Allah" now conveys the superiority or sole existence of one God, but among the pre-Islamic Arabs, Allah was a supreme deity and was worshipped alongside lesser deities in a pantheon. Many Jews, Christians, and early Muslims used "Allah" and "al-ilah" synonymously in Classical Arabic. The word is also frequently, albeit not exclusively, used by Bábists, Baháʼís, Mandaeans, Indonesian Christians, Maltese Christians, and Sephardic Jews, as well as by the Gagauz people.