Lexical and Grammatical Expansion in Arabic Lexicons:Concept and Function

The term "lexical and grammatical expansion" is one of the important terms in Arabic language, which is widely used in most Lexicons and important sources of Arabic language. It has been mentioned in various ways, but it has neither a comprehensive definition nor a clear meaning. This article is an attempt to discuss the term by referring to the main sources of Arabic language, especially the important Arabic Lexicons. It also endeavors to offer a comprehensive or almost a comprehensive definition of the term in the light of the different expressions in which it has been used and has been the cause of much ambiguity, obscurity and confusion.