What is no definition?

As an AI language model, I cannot provide any meanings or definitions for "no definition" because this is a phrase used to indicate the absence of a definition for a particular word, term, or concept. It is often used when a word or idea cannot be easily explained or understood, or when there is no established or agreed-upon definition for it. Therefore, "no definition" simply means that there is no accurate and accepted explanation or description for a particular word or concept.