castle
/ˈkæsəl/
Brit
/ˈkɑːsəl/
noun
plural
castles
/ˈkæsəl/
Brit
/ˈkɑːsəl/
noun
plural
castles
Britannica Dictionary definition of CASTLE
[count]
1
:
a large building usually with high, thick walls and towers that was built in the past to protect against attack
2
informal
:
a large expensive house
3
:
a piece in the game of chess that looks like a castle tower
:
rook
—
see picture at chess
castle in the air
also
castle in Spain
:
a dream, plan, or idea that can never become real
—
usually plural