Muslims refer to their God as Allah. Who is Allah? Is Allah male or female? Was He made of gold or silver? Does He eat or drink? Perhaps a good start is to see how God introduces Himself. He said in the Noble Quran:
He is Allah, before Whom there are no others. He knows what’s beyond seeing and also what’s plainly seen. He’s the Compassionate, the Merciful! He is Allah, before Whom there are no others: the Master, the Holy Source of Peace, the Guardian of Faith, the Protector, the Powerful, the Compeller, the Majestic. Glory be to Allah! He’s far above what they attribute to Him. He is Allah, the Creator, the Evolver, the Fashioner. The most beautiful names are His. All things within the heavens and the earth declare His praise, for He is the Powerful, and the Wise. 59:21-24
He is only one God - Allah, the Eternal, Absolute. He doesn’t give birth nor was he ever born, and there’s nothing the same as Him. Ch. 112
Allah! There is no God but He: the Living, the Everlasting! No tiredness ever seizes Him, nor does He rest. Everything in the heavens and the earth belong to Him; who can intercede with Him without His consent? He knows what’s ahead of all people and what they’ve left behind, while they have none of His knowledge except for what He allows. His throne extends over the heavens and the earth, and He never tires in their safekeeping. He alone is the Most High, the Sovereign Supreme. 2:255
Allah is not a new God that was invented with the message of Muhammad or the birth of Islam. God said: Say to them, “We believe in Allah and in what was revealed to us, as well as in what was revealed to Abraham, Ishmael, Isaac, Jacob and the tribes of Israel, and we believe in what was given to Moses and Jesus and to all other prophets from their Lord. We don’t claim that one of them was better than another, and to Him we surrender. 3:84
The definition for Allah can be found in Brittanica as: The name Allah is probably a contraction of the Arabic al-Ilāh, “the God.” The name’s origin can be traced to the earliest Semitic writings in which the word for god was il, el, or eloah, the latter two used in the Hebrew Bible (Old Testament). Allah is the standard Arabic word for God and is used by Arabic-speaking Christians and Jews as well as by Muslims. The association of the word specifically with Islam comes from the special status of Arabic as the language of Islam’s holy scripture, the Qurʾān: since the Qurʾān in its original language is considered to be the literal word of God, it is believed that God described himself in the Arabic language as Allāh. The Arabic word thus holds special significance for Muslims, regardless of their native tongue, because the Arabic word was spoken by God himself.