What defines a "cliché"?

A cliché is specifically defined as an expression or idea that has been overused to the point where it has diminished in originality and effectiveness. This overuse often means that the phrase no longer evokes the intended emotional response or conveys a fresh perspective, making it less engaging for the audience. Clichés can arise in various forms such as phrases, metaphors, or even themes in writing, and they often reflect a lack of originality or creativity in expression.

In contrast, the other options describe different concepts. Innovative ideas are characterized by their uniqueness and ability to capture attention, which is the opposite of what defines a cliché. Newly coined expressions may have a significant impact, but they are not overused and thus would not qualify as clichés. Lastly, a specific literary technique may enhance writing, but this does not encapsulate the nature of a cliché, which is about over-familiarity rather than a strategic use of language.