Definition of Religion
It depends on that how do we describe the creation of the universe. If the universe is a planed creation and obviously it is, all the Organisation and planning that exists in this universe is the argument. On the basis of this reality the Creator has special and specific plan for a human being, so the plan of Devine code of principles, the Devine guidance plan is Religion.
Quran is the last and complete version of revelation. While according to our belief the prophet Jesus(peace be upon him), Prophet Moses(peace be upon him)and all other prophets, they brought the same message from the Lord of the worlds.
Quran has used the word “Ilm” that means knowing more than 700 times and according to the Quran, it was due to the knowledge that all the angels bowed down to Adam(peace be upon him).
So knowledge is the base of religion and the basic problem in the human society is the ignorance.