Neologism Definition
 nē-ŏlə-jĭzəm 
  neologisms
  
    noun
  
 
    neologisms
  
A new word or a new meaning for an established word.
 Webster's New World 
The use of, or the practice of creating, new words or new meanings for established words.
 Webster's New World 
The invention of new words regarded as a symptom of certain psychotic disorders, such as schizophrenia.
 American Heritage Medicine 
A word so invented.
 American Heritage Medicine 
A new doctrine or a new interpretation of scripture.
 American Heritage 
Synonyms: 
 - coinage
 - neology
 - vogue-word
 - synthetic word
 - nonce-word
 - new phrase
 - new word
 
Antonyms: 
 Other Word Forms of Neologism
Noun
Singular:
 neologismPlural:
 neologismsOrigin of Neologism
-  
From French néologisme, from Ancient Greek νέος (neos, “new") + λόγος (logos, “word").
From Wiktionary
 
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