Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary
1

castle

play
noun cas·tle \ˈka-səl\

Simple Definition of castle

  • : a large building usually with high, thick walls and towers that was built in the past to protect against attack

  • : a large expensive house

  • : a piece in the game of chess that looks like a castle tower

Source: Merriam-Webster's Learner's Dictionary

Full Definition of castle

  1. 1 a :  a large fortified building or set of buildings b :  a massive or imposing house

  2. 2 :  a retreat safe against intrusion or invasion

  3. 3 :  3rook

Examples of castle in a sentence

  1. Millionaires built their castles along the lake.

  2. <the implacable attackers placed the castle under a prolonged siege>



Illustration of castle

Origin of castle

Middle English castel, from Old English, from Old French & Latin; Old French dialect (Norman-Picard) castel, from Latin castellum fortress, diminutive of castrum fortified place; perhaps akin to Latin castrare to castrate


First Known Use: before 12th century

Rhymes with castle


2

castle

verb cas·tle

Definition of castle

castledcastling play \ˈka-s(ə-)liŋ\

  1. transitive verb
  2. 1 :  to establish in a castle

  3. 2 :  to move (the chess king) in castling

  4. intransitive verb
  5. :  to move a chess king two squares toward a rook and in the same move the rook to the square next past the king



1587

First Known Use of castle

1587



CASTLE Defined for Kids

castle

play
noun cas·tle \ˈka-səl\

Definition of castle for Students

  1. 1 :  a large building or group of buildings usually having high walls with towers that was built in the past to protect against attack

  2. 2 :  a large or impressive house





Seen and Heard

What made you want to look up castle? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

marked by propriety and good taste

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image567572573

Which of these is a synonym of unctuous?

oily maudlin prompt angry
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ