The Arabic word Allah means God ,the one and only true God who created the whole universe which is used by Arabic speakers, both Arab Muslims and Arab Christians. This word cannot be used to designate anything other than the one true God.

{ He is Allah , other than whom there is no deity, the Sovereign, the Pure, the Perfection, the Bestower of Faith, the Overseer, the Exalted in Might, the Compeller, the Superior. Exalted is Allah above whatever they associate with Him }

{ The Quran 59:23 }

{ You alone we worship } { The Quran 1:5 }

The primary pillar of Islamic belief clearly states that there is nothing worthy of worship except God. Associating partners with God or attributing qualities of lesser beings to Him is considered to be the greatest sin in Islam.