of, relating to, or characterized by illusions; deceptive; misleading.

What does non illusionary mean?

lacking in reality or substance or genuineness; not corresponding to acknowledged facts or criteria.

Is illusionary an adjective?

Although the adjective illusory can describe anything that’s based on an illusion, it often has the negative connotation of being deliberately deceptive.

History and Etymology for illusion

Middle English, from Anglo-French, from Late Latin illusion-, illusio, from Latin, action of mocking, from illudere to mock at, from in- + ludere to play, mock — more at ludicrous.