In literature, "defined" functions as a versatile tool that both clarifies abstract concepts and delineates physical or conceptual boundaries. Authors often use it to explain ideas by setting limits or exacting criteria; for example, Bertrand Russell speculates that knowledge could be defined as "true belief" [1] while Durkheim distinguishes specific rites through precise definition [2]. In more descriptive narrative, the term highlights clarity and sharp contours—Tolstoy’s characters are described as having more defined features [3], and Verne portrays natural elements with well-defined outlines [4]. In academic and grammatical texts, "defined" serves as an instrument for accuracy, specifying meaning and structure in diverse contexts such as Latin grammar entries [5, 6, 7]. Whether establishing the limits of dominions [8] or setting the components of personality [9], the word "defined" consistently acts as a bridge between vagueness and precise understanding within literature.