Which of the following best defines a 'cliche'?

A cliché is best defined as a statement or phrase that has been overused to the point that it has lost its originality and impact. This overuse renders the cliché less effective in communication, as it no longer provides the fresh insight or emotion that it might have originally conveyed. For example, phrases like "time heals all wounds" or "the grass is always greener on the other side" are common clichés that many people recognize but may no longer find striking or meaningful due to their frequency of use.

The other options describe terms or concepts that do not align with the definition of a cliché. An original phrase that captivates the audience suggests novelty and creativity, which is the opposite of a cliché. A unique metaphor expressing a deep idea conveys originality and significance, characteristics that clichés lack. Similarly, a complex statement requiring deep analysis implies a level of thought and nuance not typically associated with the simplicity and predictability of clichés. Therefore, the correct choice accurately reflects the essence of what makes a cliché distinct from other forms of expression.