Muslims believe above all else that Allah or God is the sole divine deity who does not share his divinity with other partners.

Islam meaning tawhid. In Islamic countries in the Middle Ages it was even written on coins meaning you couldnt buy a bag of onions without being reminded. There is no god except Allah and Muhammad alaihis-salâm is. Whoever does not acknowledge Allaah in these terms and does not describe Him as being One with no partner or associate does not believe in Tawheed.

The brief meaning of it is as follows. Tawheed is worshipping Gods in all forms. And thats a big part of Islams appeal.

Islam believes in Tawheed which is not merely monotheism ie. Muslims believe Tawhid is the fundamental belief that God is one and that there is only one God. Belief in one unique God but much more.

Tawhid also spelled Tauhid Arabic Tawḥīd making one asserting oneness in Islam the oneness of God in the sense that he is one and there is no god but he as stated in the shahādah witness formula. Tawhid or Tauheed is the concept of monotheism in Islam. Tawheed literally means unification.

Tawheed is the most important Islamic belief. It is the religions most fundamental concept and holds God as one and unique. Tawhid is the religions central and single-most important concept upon which a Muslims entire faith rests.

There is no god but God and Muhammad is His prophet. It implies that everything in existence originates from the one and only Creator who is also the Sustainer and the sole Source of Guidance. Allaah is Waahid meaning that He has no rivals or peers in any way.