Al-Sa'eed Ahrou's seminal work, 'Definition in Arabic Rhetoric: Its Origins, Structures, and Functions,' offers an in-depth scholarly examination of the concept of 'definition' (التعريف) within the rich tradition of Arabic rhetoric. The book meticulously traces the historical evolution of definitional practices, analyzes their intricate structural components, and elucidates their varied functional roles in shaping rhetorical discourse. Ahrou provides a comprehensive framework for understanding how definitions operate not merely as descriptive tools but as fundamental building blocks for persuasion, argumentation, and the clarity of expression in classical Arabic literary and linguistic contexts. This study is indispensable for students and scholars of Arabic language, literature, and rhetoric seeking a profound insight into a core rhetorical concept.