The study deals with the adjective in the name of the sign in the Holy Qur'an, and I chose the adjective; Because it is one of the grammatical functions that occupy an important space in the Qur'anic text, and the study singled out the adjective in the name of the sign; Because it is a delicate course in which there is a disagreement between grammarians, so I wanted to reveal the curtain about it ...