- The definition of a castle is a large fortified building or set of buildings where royalty lives, or a large and impressive house.
- A fortified building with a moat and a draw bridge where the king lives is an example of a castle.
- A huge impressive mansion is an example of a castle.
- To castle is a move in chess involving the rook chess piece.
An example of castle is to move the king piece two squares and place the nearest rook on the square which was jumped by the king.
The entrance to Warwick castle.
- a large building or group of buildings fortified with thick walls, battlements, and often a moat; castles were the strongholds of noblemen in the Middle Ages
- any massive dwelling somewhat like this
- a safe, secure place; refuge
- Chess rook
Origin of castleMiddle English ; from Old English and amp; Anglo-French castel ; from Classical Latin castellum, diminutive of castrum, fort
transitive verbcastled, castling
- to put into, or furnish with, a castle
- Chess to move (a king) two squares to either side and then, in the same move, set the castle in the square skipped by the king: permitted only when neither piece has been moved before and the spaces between them are not occupied
- a. A large fortified building or group of buildings with thick walls, usually dominating the surrounding country.b. A fortified stronghold converted to residential use.c. A large ornate building similar to or resembling a fortified stronghold.
- A place of privacy, security, or refuge.
- Games See rook2.
verbcas·tled, cas·tling, cas·tles
verb, intransitive Games
- To place in or as if in a castle.
- Games To move (the king in chess) by castling.
Origin of castleMiddle English castel, from Old English and from Norman French, both from Latin castellum, diminutive of castrum; see kes- in Indo-European roots.
Raglan Castle near Raglan, Wales
- A large building that is fortified and contains many defences; in previous ages often inhabited by a nobleman or king.
- (chess) An instance of castling.
- (chess, informal) A rook; a chess piece shaped like a castle tower.
- (dated) Any strong, imposing, and stately mansion.
- (dated) A small tower, as on a ship, or an elephant's back.
For the chess piece, chess players prefer the term rook.
(third-person singular simple present castles, present participle castling, simple past and past participle castled)
- cleats, sclate
From Middle English castle, castel, from Old English castel, castell, cæstel, ċeastel (“a town, village, castle”), borrowed from Late Latin castellum (“small camp, fort”), diminutive of Latin castrum (“camp, fort, citadel, stronghold”), possibly from Proto-Indo-European *kat- (“hut, shed”). Parallel borrowings (from Late Latin or Old French) are Scots castel, castell (“castle”), West Frisian kastiel (“castle”), Dutch kasteel (“castle”), German Kastell (“castle”), Danish kastel (“citadel”), Swedish kastell (“citadel”), Icelandic kastali (“castle”). The Middle English word was reinforced by Anglo-Norman/Old Northern French castel, itself from Late Latin castellum (“small camp, fort”) (compare modern French château from Old French chastel). If Latin castrum (“camp, fort, citadel, stronghold”) is from Proto-Indo-European *kat- (“hut, shed”), Latin casa (“cottage, hut”) is related. Possibly related also to Gothic [script?] (hēþjō, “chamber”), Old English heaþor (“restraint, confinement, enclosure, prison”). See also casino, cassock.