Define Private Language.

The concept of a "private language" is associated with the philosophy of Ludwig Wittgenstein, particularly in his later work, "Philosophical Investigations." A private language, according to Wittgenstein, is a language that is intelligible only to a single individual and cannot be shared or understood by others.

Wittgenstein argues against the possibility of a truly private language by highlighting the inherent social and communal nature of language. Language, he contends, derives its meaning through public, shared practices and experiences. The use of words is grounded in communal understanding and is shaped by the public criteria that regulate their meanings.

Wittgenstein's critique challenges the idea that an individual could create a language that is entirely subjective and known only to them. He argues that the meaning of words is contingent on their use within a community, and without this communal basis, the very idea of meaningful communication breaks down.

The notion of a private language is crucial to Wittgenstein's broader philosophy, emphasizing the importance of communal understanding, linguistic practices, and the public nature of language in the construction of meaning. It contributes to his later shift away from the view presented in his earlier work, "Tractatus Logico-Philosophicus," where he entertained the idea of a private language.