Definitions

1. noun

A made-up or imaginary word, especially one that sounds plausible or has a convincing etymology.

“The linguist was accused of inventing a fictionary to test the limits of the language’s capabilities.”

2. adjective

Describing a word or term that is made-up or invented, but appears to be real or authentic.

“The science fiction novel used many fictionary terms to create a sense of otherworldliness.”