As a religion...
As a religion, in the form of a proper noun, it is the perfection of din (please see din) before Allah. As a word, it has a variety of meanings, most suitable for the final stage of Allah's din. Various derivatives of its root denote perfection, safety, security and protection, health and freedom from defect, salvation and preservation, peace and tranquillity, salutation and greetings, reconciliation, and most importantly, submission to the will of Allah, and obedience.
Jinn: Jinns are made of smokeless fire, men made of clay, and Angels made of light. As in the case of mankind, there are both believers and unbelievers, among jinnkind. Their bodies are mare subtle than those of humans, and cannot be normally seen by mankind. But they are known to have affected the lives of men in various ways. Ka’bah, the: The Holy focal point representing the Oneness of Allah and his Islam. There are indications that it was first built by The Prophet Adam (PBUH).
But it is certain that its construction goes back at least to the time of The Prophet Abraham and his son Ishmael (PBUT). After the establishment of truth of the Unity of Allah by The Prophet Abraham (PBUH), people gradually fell into idol worship again for many generations until the time of Muhammad (SA), when the Kacbah was cleared of idols, and the worship of One True Allah was re‑established.
Muslims, worldwide, turn to the Kacbah when praying, as a convergence to the Oneness of Allah and the Unity of His din. The Kacbah is also a focal point for the unity of Muslims when they gather together during the pilgrimage. The rite of circumambulation around the Kacbah emulates the circumambulation of angels around the Throne of Allah in the Heavens. Khums: a tax on surplus wealth. Madyan: Midianites. The Prophet Jethro (PBUH) was missioned by Allah for guidance of this community.
Messenger: See nabiy (Divine Prophet) and rasul (Divine Apostle). Messenger is taken to mean either nabiy or rasul. Mishkah: Niche. Mubin: According to A. Yusuf cAli, the renowned translator of the Glorious Qur'an, mubin means beautifully plain, clear, unambiguous, self‑evident, not involved in mysteries of origin, history, or meaning, one which everyone can understand as to the essentials necessary for him (or her).
Mubin has all these meanings, but it suggests, besides, some quality of a shining light, by which we are able to make things clear, to distinguish the true from the false.