- (linguistics) A word or phrase which has recently been coined; a new word or phrase.
- (linguistics, uncountable) The act or instance of coining, or uttering a new word.
- (psychiatry) The newly coined, meaningless words or phrases of someone with a psychosis, usually schizophrenia.
For a word to be no longer considered new, it needs to be understood by a significant portion of the population as having always been a valid word. For that to occur the word must have been in common use for approximately one generation — fifteen to twenty years — but there is no universally accepted measure. Also note that although some neologisms may be in prevalent use, others have only a few usages. Neologisms however always have more prevalent usage than protologisms.
- The Oxford Dictionary of American Usage and Style. Bryan A. Garner. Oxford University Press, 2000. Oxford Reference Online. Oxford University Press. 21 June 2006
- The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.