What is the definition for a circular definition?

A circular definition is indeed defined as one that uses the term itself to explain the concept, creating a loop in reasoning that does not provide additional clarity or understanding. This type of definition can be problematic because it does not offer new information or context that would help someone who is unfamiliar with the term comprehend its meaning.

For instance, if one were to define "vehicle" as "a vehicle is something that transports people or goods," the explanation does not enhance understanding since it employs the very term being defined. The key aspect of a circular definition lies in this self-referential nature, which fails to deliver meaningful insights or explanations to the reader or listener.

In contrast, the other definitions provided would be less relevant to the concept of circular definitions. Using synonyms or examples can enhance understanding, and complex explanations can provide more depth—none of which create the inherent ambiguity found in circular definitions.