The theory of radial networks is one of the most important issues of the cognitive linguistics. According to this theory, each and every meaning has a core meaning or a prototype of which other meanings have been developed. This theory has been of great influence on semantics. In the present article, the author will study the influence of this theory on semantics of the Quranic words. According to the author, one of the shortages in the religious studies in general and in the Quranic studies in particular is the lack of clear and precise semantic ideas. In the present article, at first, the theory of radial networks has been described in brief; and then two various versions of the theory have been mentioned. Then and along these lines, the author have discussed instances from the Holy Quran.