castles
cas-tles · noun
Definitions
noun
- 1.
Plural of castle; multiple fortified buildings.
- 2.
In chess, both rook pieces.
Phrases & expressions
- •castles in the air — unrealistic plans or fantasies
- •castles in Spain — daydreams, impractical schemes
Related words
Etymology
From Old English castel, from Latin castellum ("fortress"). The plural follows standard English formation with the addition of -s.