Mullā Ṣ adrā pays due attention to linguistic issues in the phrasing of his ideas and discusses the difference between nominal and copulative meanings. His commentators have detected some incoherences in his views so that they have judged some of them to be more accurate and, thus, more favorable, than some others. Through propounding and comparing Mullā Ṣ adrā ’ s views regarding the nominal and copulative meanings of being, the author presents a framework for posing some ontological, epistemological, and linguistic discussions in this paper. At the same time, relying on the linguistic discussions in jurisprudence (uṣ ū l-i fiqh), he introduces an analytic-linguistic approach in order to solve the problem of the existing incoherences. Mullā Ṣ adrā believes that, on the one hand, one can reach the univocality of the nominal meaning of being (hast) through the univocality of the copulative meaning of being (ast). On the other hand, he argues that the difference between copulative being and predicative being pertains to their species. This view of Mullā Ṣ adrā has raised different debates, interpretations, and questions among authorities in the field of philosophy. Some of these questions are as follows: Are these two views consistent with each other? Is this theory consistent with the gradation of existence and its univocal meanings? Are copulative and predicative existence commensurate with each other? Are the two classifications of being in the Transcendent Philosophy; i. e. the three-fold division of being into copula, copulative, and soulish and the two-fold division of being into copula and independent being, in contrast to each other? Are these two classifications consistent with Mullā Ṣ adrā ’ s views in the field of nominal and copulative meanings?