castle in the air

SEE MORE SYNONYMS FOR castle in the air ON THESAURUS.COM

noun

a fanciful or impractical notion or hope; daydream.

Origin of castle in the air

First recorded in 1570–80

Also called air castle, castle in Spain.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for air castle

daydream, reverie, nightmare, delusion, fancy, illusion, vision, mirage, invention, chimera, trip, rainbow, creativity, originality, bubble, flight, apparition, figment, fabrication, vagary

Examples from the Web for air castle

Historical Examples of air castle

Often while the lamp burnt low, and a horse-bell jangled sadly, they laughed together in a castle-in-the-air.
To Tell You the Truth
Leonard Merrick

British Dictionary definitions for air castle

castle in the air

castle in Spain

noun

a hope or desire unlikely to be realized; daydream

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012