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top: straight horizontal rules appear curved
bottom: a gray box against a black background appears lighter than the same gray box against a white background


a. An erroneous perception of reality: Mirrors gave the illusion of spaciousness.
b. An erroneous concept or belief: The notion that money can buy happiness is an illusion.
2. The condition of being deceived by a false perception or belief: spent months flailing about in illusion.
3. Something that is erroneously perceived or construed: The animal in the shadows turned out to be an illusion.
4. A fine transparent net fabric, used for dresses or trimmings.

[Middle English illusioun, from Old French, from Late Latin illūsiō, illūsiōn-, from Latin, a mocking, irony, from illūsus, past participle of illūdere, to mock : in-, against; see in-2 + lūdere, to play; see leid- in Indo-European roots.]

il·lu′sion·al, il·lu′sion·ar′y (-zhə-nĕr′ē) adj.
il·lu′sion·less adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.illusional - marked by or producing illusion; "illusionary stage effects"
unreal - lacking in reality or substance or genuineness; not corresponding to acknowledged facts or criteria; "ghosts and other unreal entities"; "unreal propaganda serving as news"
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References in periodicals archive ?
Research has it that young women have for centuries joined armed groups as a means of challenging oppressive, biased norms that restrict women from taking full participation in the public and private spheres in their communities, with the illusional hope of building new societies that promise them lives of meaning, value, and dignity.
The technique allows designers to create the great illusional effect.
Illusional looks a worthy rival from the Mark Johnston operation, but Ostilio must surely take the beating in the 32Red.
The battle for second and third was keenly fought with Aloha Illusional under Jill Colwell and Ausden Prince Mahal under Debra Pickford, battling hard.
These researchers concluded that although repetitive RHI training facilitates multisensory integration and physiological habituation to an incongruent multisensory environment, sleep corrects illusional integration and habituation of proprioceptive drift.
A party that likes to play the 'NHS is safe with us' illusional trick but never mentions how the system is being drained by plenty of those that have never contributed, nor are likely to in the future.
Sabrina the Teenage Stitch - also know as Sabrina Bourgoin - worked her magic to create an illusional portrait of the TV star, from strands of wool.
if only people did their jobs as given by law and conscience and not give into powers that be -- illusional or real.