from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A new word, expression, or usage.
  • noun The creation or use of new words or senses.
  • noun The invention of new words regarded as a symptom of certain psychotic disorders, such as schizophrenia.
  • noun A word so invented.
  • noun Theology A new doctrine or a new interpretation of scripture.

from The Century Dictionary.

  • noun A new word or phrase, or a new use of a word.
  • noun The use of new words, or of old words in new senses.
  • noun A new doctrine.

from the GNU version of the Collaborative International Dictionary of English.

  • noun The introduction of new words, or the use of old words in a new sense.
  • noun A new word, phrase, or expression.
  • noun A new doctrine; specifically, rationalism.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun linguistics A word or phrase which has recently been coined; a new word or phrase.
  • noun linguistics (uncountable) The act or instance of coining, or uttering a new word.
  • noun psychiatry The newly coined, meaningless words or phrases of someone with a psychosis, usually schizophrenia.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a newly invented word or phrase
  • noun the act of inventing a word or phrase


from Wiktionary, Creative Commons Attribution/Share-Alike License

From French néologisme, from Ancient Greek νέος ("new") + λόγος (logos, "word").


Help support Wordnik (and make this page ad-free) by adopting the word neologism.



Log in or sign up to get involved in the conversation. It's quick and easy.

  • and my favorite new word: wordie!

    December 9, 2006

  • There are tons of neologisms on this site.

    April 15, 2007

  • Thanks to Erin McKean for her help with the definition for my neologism "Impert." A person who makes valuable contributions in a field of knowledge despite lacking formal training or professional connections in that field. The impert's contributions typically diverge from conventional styles, thinking, or theories of experts.

    December 11, 2012

  • Often employers are driven by Law and its acts and regulations. Fiduciary responsibility also enters into that equation. So the organisation has to do its due diligence. While proper form would indicate training directed at compliance would simple lip service in the form of berating and controlling workers through interviews and evaluations about nonsensical goals be called due DIKIGENCE?

    November 18, 2015

  • once upon a time neologism was a neologism

    September 18, 2017