1. false ideas or beliefs; things that are not what they seem to be
Usage: plural of illusion
2. tricks that make something appear different from what it actually is, especially in magic or visual perception
Usage: plural of illusion

Examples

• The magician performed amazing optical illusions on stage.
• Many people have illusions about how easy it is to become famous.
• The desert heat created illusions of water on the road.
• She had no illusions about the difficulty of the task ahead.
• The mirror created strange illusions in the funhouse.
• His illusions about college life were quickly shattered.
• The artist specialized in creating visual illusions with paint.