Comparative Conceptology of "Monotheists" and "Sabians" in Quran

The present paper mainly tries to comparatively study the concepts of "Monotheists" and "Sabians" in the Holy Quran and find out whether they are synonym or not. Since different religious societies and groups existed during the revelation of Quran and studying these groups and societies has some problems and complexities, the comparative study of related Quranic terms will be of great help to solve these problems. Using a descriptive-analytical method, the present paper tries to organize the discussions on the basis of a logical and fundamental conceptology. The research findings show that "monotheist" and "monotheists" mentioned in Quranic verses do not refer to a particular group or faith; rather, it is an adjective for religion and faith generally. However, "Sabians" are particular religious groups that are included among the people of book, so they are different from "monotheists".