Definability of the Existence of God from the Perspective of Ibn Sina, Suhrewardi and Mulla Sadra

The paper aims to evaluate the possibility of defining the existence of God from the perspective of four philosophers who have a school and are influential in the Islamic world; Ibn Sina, Sheikh Ishraq Suhrawardi, Sadr al-Muta'allehin Shirazi and Allameh Tabatabai have been done with a library method with an analytical, descriptive and comparative approach.After analyzing the views and solutions presented, we came to the conclusion that, firstly, God is definable, and secondly, God is indefinable through the definition of true limit, but God is definable through rational means. The definition of rational devices is of the official definition type and has a real limit due to its use on near-object objects.With this explanation, the theory of the definiteness of God's existence will not conflict with the rule of "al-Wajib al-Lahd al-Lah"; Because the provisions of the rule consider God to be indefinable through definitions of a true essential limit, but by accepting the definition to the rational means, this conflict will be resolved.