Identification And Indefinite are two major linguistic phenomenon in Arabic Language; the first means Indicating a definite thing, whereas the second indicates common. Identification comes through varied ways such as inserting Definite Article (لا) to a noun ; it is here called ' identified with Definite Article (لا). Identifying a noun with Definite Article (لا) is intended for specific purposes and indications ; it is neither randomly nor arbitrarily , so this research is concerned to study main indications that Definite Article (لا) shows when inserted to the name, and rhetorical sides stems from that Definite Article (لا) insertion to a name especially the Predicate. Research reveals importance of granting the name new characteristics which are not known before Definite Article (لا) is inserted into it