The application of allusions as an expressive means has a long past in the history of peoples and nations' linguistics. Metonym is considered to be one of the most outstanding artistic techniques in language, showing the power of interpretation and the effect of speech. Due to rhetorical reasons and observing the discoursal norms for its audience, the Holy Qur'an is teemed with allusive expressions, the understanding of whose extensive meanings, which is beyond the apparent wording, is possible only through perceiving intricacies and literary and rhetorical points, particularly allusions. Thus, while briefly reviewing the concept of allusion among great rhetoricians and providing an approximate number of Qur'anic allusions and their different types based on rhetorical and exegetic texts, the present paper gives examples of each. In addition, stating the rhetorical reasons of applying allusions in the Holy Qur'an, this study concludes that using euphemism and avoiding dysphemism is one of the most important devices of this artistic style in the Qur'an. Finally, it proposes a new type/title of Arabic allusion for the meticulous analysis and determination of Qur'anic allusions.