Castle | Mean of castle in English Dictionary

/ˈkæsəl/

• Noun
• a large building usually with high, thick walls and towers that was built in the past to protect against attack
• a large expensive house
1. Millionaires built their castles along the lake.
• a piece in the game of chess that looks like a castle tower

• a dream, plan, or idea that can never become real
1. He's just building castles in the air if he thinks he can open a restaurant without any money.