The act of making up new words that have a special meaning for the inventor. The term also refers to the invented words themselves. Persistent neologism can be a feature of speech in people with schizophrenia.
n. (in psychiatry) the invention of words that do not exist in one’s language. It is common in childhood, but when it occurs in an adult it may be a symptom of a psychotic illness, such as *schizophrenia. It should be distinguished from *paraphasia, in which new meanings are attached to ordinary words.