The Collaborative International Dictionary
illusionary \illusionary\ adj. marked by or producing illusion; as, illusionary stage effects.
Syn: illusional.
Douglas Harper's Etymology Dictionary
1886, from illusion + -ary.
Wiktionary
a. illusory; pertaining to an illusion, or of the nature of an illusion.
WordNet
adj. marked by or producing illusion; "illusionary stage effects" [syn: illusional]
Usage examples of "illusionary".
Your scientific methods instead of leading you onward towards the Central Sun of Spiritual enlightenment has so beclouded your vision that your race today--that is, the so-called enlightened and learned portions of your population--have been deflected from the main path, and they will soon find themselves pursuing an illusionary will-o'-the-wisp.
About an empress, a poetess, a pop star, one might be opinionative, for such women either are frozen in the amber of history or are speeding with one down the illusionary road of one's own time.
If need be, he could field the rain of toads and the demon, but those would hardly be potent against his thralls, since they knew the illusionary nature of the amphibians and red giant.