the introduction or use of new words or new senses of existing words.
3.
a new doctrine, especially 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.
Origin: 1790–1800; < Frenchnéologisme. See neology, -ism
"practice of innovation in language," 1800, from Fr. néologisme, from neo- + logos "word." Meaning "new word or expression" is from 1803. Neological is attested from 1754.