1. [syn: reverie, revery, daydream, daydreaming, oneirism, air castle, castle in the air, castle in Spain]
The Collaborative International Dictionary of English v.0.48:
Castle \Cas"tle\, n. [AS. castel, fr. L. castellum, dim. of
castrum a fortified place, castle.]
1. A fortified residence, especially that of a prince or
nobleman; a fortress.
The house of every one is to him castle and
fortress, as well for his defense againts injury and
violence, as for his repose. --Coke.
Our castle's strength
Will laugh a siege to scorn. --Shak.
Note: Originally the medi[ae]val castle was a single strong
tower or keep, with a palisaded inclosure around it and
inferior buidings, such as stables and the like, and
surrounded by a moat; then such a keep or donjon, with
courtyards or baileys and accessory buildings of
greater elaboration a great hall and a chapel, all
surrounded by defensive walls and a moat, with a
drawbridge, etc. Afterwards the name was retained by
large dwellings that had formerly been fortresses, or
by those which replaced ancient fortresses. A Donjon or
Keep, an irregular building containing the dwelling of
the lord and his family; B C Large round towers ferming
part of the donjon and of the exterior; D Square tower,
separating the two inner courts and forming part of the
donjon; E Chapel, whose apse forms a half-round tower,
F, on the exterior walls; G H Round towers on the
exterior walls; K Postern gate, reached from outside by
a removable fight of steps or inclined plane for
hoisting in stores, and leading to a court, L (see
small digagram) whose pavement is on a level with the
sill of the postern, but below the level of the larger
court, with which it communicates by a separately
fortified gateway; M Turret, containing spiral stairway
to all the stories of the great tower, B, and serving
also as a station for signal fire, banner, etc.; N
Turret with stairway for tower, C; O Echauguettes; P P
P Battlemants consisting of merlons and crenels
alternately, the merlons being pierced by loopholes; Q
Q Machicolations (those at Q defend the postern K); R
Outwork defending the approach, which is a road
ascending the hill and passing under all four faces of
the castle; S S Wall of the outer bailey. The road of
approach enters the bailey at T and passes thence into
the castle by the main entrance gateway (which is in
the wall between, and defended by the towers, C H) and
over two drawbridges and through fortified passages to
the inner court.
2. Any strong, imposing, and stately mansion.
3. A small tower, as on a ship, or an elephant's back.
4. A piece, made to represent a castle, used in the game of
chess; a rook.
Castle in the air, a visionary project; a baseless scheme;
an air castle; -- sometimes called a castle in Spain (F.
Ch[^a]teau en Espagne).
Syn: Fortress; fortification; citadel; stronghold. See
WordNet (r) 3.0 (2006):
castle in the air
n 1: absentminded dreaming while awake [syn: reverie,
revery, daydream, daydreaming, oneirism, air
castle, castle in the air, castle in Spain]
Moby Thesaurus II by Grady Ward, 1.0:
28 Moby Thesaurus words for "castle in the air":
Xanadu, airy nothing, autism, bubble, castle in Spain, chimera,
daydream, deception, deluded belief, delusion, dereism, dream,
dream vision, dreamland, dreamworld, false belief, ignis fatuus,
illusion, misbelief, misconception, pipe dream, self-deceit,
self-deception, self-delusion, trick, trip, vapor,