il·lu·sion
/iˈlo͞oZHən/Submit
noun
a thing that is or is likely to be wrongly perceived or interpreted by the senses.
"the illusion makes parallel lines seem to diverge by placing them on a zigzag-striped background"
synonyms: mirage, hallucination, apparition, phantasm, phantom, vision, specter, fantasy, figment of the imagination, will-o'-the-wisp, trick of the light; ignis fatuus
"the magical illusion is created using mirrors, lights, and paint"
a deceptive appearance or impression.
"the illusion of family togetherness"
synonyms: appearance, impression, imitation, semblance, pretense, sham; More
a false idea or belief.