neologism

noun

Etymology: From French néologisme, from Ancient Greek νέος (néos, “new”) + λόγος (lógos, “word”) + -ism.

1. A word or phrase which has recently been coined; a new word or phrase.

   “These neologisms demonstrate the cumulative quality of language, in which we use the known to describe the unknown.”

2. An existing word or phrase which has gained a new meaning.
3. The act or instance of coining, or uttering a new word.

   “Neologizing, the practice of coining new words, may seem to be an arcane, specialized activity, but it's everywhere -- and the skillful employment of neologism is what gives English much of its verve.”

4. The newly coined, meaningless words or phrases of someone with a psychosis, usually schizophrenia.
5. Synonym of neology.