neologism

noun5

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. — 2015
2. •
   The newly coined, meaningless words or phrases of someone with a psychosis, usually schizophrenia.
3. •
   An existing word or phrase which has gained a new meaning.
4. •
   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. — 2002
5. •
   (historical) Synonym of neology.