1. something that appears to exist or be true but is not real or possible
2. a false idea or belief about something
3. a magic trick that deceives the eye or mind

Examples

• The desert heat created an illusion of water on the road.
• She was under the illusion that everyone liked her.
• The magician performed an amazing illusion with disappearing coins.
• His success gave him the illusion of being invincible.
• The mirror created an optical illusion that made the room look bigger.
• It’s an illusion to think that money will solve all problems.
• The artist used perspective to create the illusion of depth.