neologism

A word or phrase which has recently been coined; a new word or phrase.

These neologisms demonstrate the cumulative quality of language, in which we use the known to describe the unknown.

An existing word or phrase which has gained a new meaning.

The act or instance of coining, or uttering a new word.

Neologizing, the practice of coining new words, may seem to be an arcane, specialized activity, but it's everywhere -- and the skillful employment of neologism is what gives English much of its verve.

The newly coined, meaningless words or phrases of someone with a psychosis, usually schizophrenia.

Synonym of neology.