This essay attempts to demonstrate, via surveying 10 classics in the history of rhetoric, that “ornament” collocated with rhetorical figures is widely viewed as inventional or argumentative, especially from ancient Greece to the Renaissance. Further, 5 representative dictionaries illustrate that this term gives priority to useful function in and before the medieval time but turns increasingly aesthetic from the Enlightenment downwards. In a historical-linguistic perspective, the semantic change of “ornament” is discovered to involve two tendency types: “Narrowing” and “Pejoration”, which can be attributed to psychological or cognitive factors, cultural impact and language contact. This rectification of “ornament” justifies from etymology an...