Pronunciation: (nE-ol'u-jiz"um), [key] —n. 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. 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.