1. an imaginary place or situation that is unrealistic or impractical
Usage: often used to suggest someone is being unrealistic
2. a themed area of an amusement park featuring fairy tale or fantasy elements
Usage: capitalized when referring to specific park areas

Examples

• He’s living in fantasyland if he thinks he can become a professional athlete without training.
• Her business plan sounds like pure fantasyland to me.
• The politician’s promises seem to come from fantasyland rather than reality.
• We visited Fantasyland at the theme park and rode the carousel.
• The children loved exploring the castle in Fantasyland.
• Stop living in fantasyland and face the facts.
• His ideas about easy money are straight out of fantasyland.