neologism: Meaning and Definition of

ne•ol•o•gism

1. a new word, meaning, usage, or phrase.
2. the introduction or use of new words or new senses of existing words.
3. a new doctrine, esp. a new interpretation of sacred writings.
4. 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.