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Definition of castle

castle

/ˈkæs.əl/
cas · tle

Plural:castles
•
Past Simple:castled
•
Past Participle:castled
•
Present Participle:castling
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castle Lexical Profile

castle Game Scores & Validity

• noun

1

A large, highly fortified building or group of buildings constructed in the Middle Ages, typically serving as a royal or noble residence and a defensive stronghold.

Example

"The king's army besieged the stone castle for three months before finally breaching its outer walls."


2

A chess piece shaped like a turret or tower; traditionally known in modern play as a rook.

Example

"He slid his castle down the open file to place direct pressure on his opponent's back rank."

Synonyms
View all synonyms for castle

• verb

1

To make a special move in chess wherein the king advances two squares toward a rook, and the rook is moved to the square the king just crossed.

Example

"She decided to castle early in the game to protect her king from a dangerous attack in the center of the board."

Word Nuance & Usage

While often used interchangeably with 'palace' or 'fortress', a true historical castle specifically combines the functions of a defensive military fortification and a noble or royal residence.

• Rhymes for castle

Word Origin & Etymology

Derived from Old Norman French 'castel', originating from the Latin 'castellum', which is a diminutive of 'castrum' meaning 'fort' or 'military camp'.

Usage Trend

Historical frequency of usage in published text.

180019102020

Cite this Entry


Wordmom. (2026). Definition of Castle. In Wordmom Dictionary. Retrieved Oct 17, 2026, from https://wordmom.com/dictionary/castle
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