Pronunciation: /ˈkæsəl ɪn ði ɛr/
noun a large building or group of buildings fortified against attack with thick walls, battlements, towers, and in many cases a moat
A1 I often daydream about living in a castle in the air.
A2 She built a castle in the air where she could escape from reality.
B1 His plans to become a famous actor were just a castle in the air.
B2 The idea of starting his own business seemed like a castle in the air at first.
C1 The politician's promises of a perfect society were dismissed as mere castles in the air.
C2 Despite the challenges, she was determined to turn her castle in the air into a reality.
preposition a word governing, and usually preceding, a noun or pronoun and expressing a relation to another word or element in the clause
A1 She often talks about her plans for a castle in the air.
A2 Dreaming about a castle in the air is a common pastime for many people.
B1 Building a castle in the air may seem unrealistic, but it's important to have dreams.
B2 Despite the challenges, he never gave up on his castle in the air.
C1 The concept of a castle in the air can be seen as a metaphor for unattainable dreams.
C2 Her elaborate plans for a castle in the air were met with skepticism by others.
formal The idea of starting a business without a solid plan is like building a castle in the air.
informal Thinking about becoming a millionaire overnight is just like building a castle in the air.
slang Dreaming about winning the lottery is like building a castle in the air.
figurative His plans for a lavish vacation seemed like a castle in the air, considering his limited budget.
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