a new word, meaning, usage, or phrase.
the introduction or use of new words or new senses of existing words.
a new doctrine, especially a new interpretation of sacred writings.
Psychiatry. a new word, often consisting of a combination of other words, that is understood only by the speaker: occurring most often in the speech of schizophrenics.
Origin of neologism
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
noun plural -gisms or -gies
a newly coined word, or a phrase or familiar word used in a new sense
the practice of using or introducing neologisms
rare a tendency towards adopting new views, esp rationalist views, in matters of religion
Word Origin for neologism
C18: via French from neo- + -logism, from Greek logos word, saying
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Online Etymology Dictionary, © 2010 Douglas Harper
A meaningless word used by a psychotic.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.