Illustration of castle
- 1 fortified approach
- 2 moat
- 3 drawbridge
- 4 ward
- 5 angle tower
- 6 donjon or keep
- 7 chapel
- 8 gallery
1
a
: a large fortified building or set of buildings
b
: a massive or imposing house
2
: a retreat safe against intrusion or invasion
3
castled; castling
ˈka-s(ə-)liŋ 
: to move a chess king two squares toward a rook and in the same move the rook to the square next past the king
Examples of castle in a Sentence
Noun
Millionaires built their castles along the lake.
the implacable attackers placed the castle under a prolonged siege
Recent Examples on the Web
Christa Swanson,
CBS News,
28 June 2026
Two years ago, the Man City phenom appeared in a 90-second spot for the game that saw him get recruited to storm a castle teeming with goblins, dragons and impish skeletons.
—
Anthony Crupi,
Sportico.com,
26 June 2026
Tim Ellis,
Forbes,
4 Mar. 2025
For example, pawns could not move two squares on their first turn, and there was no similar rule for castling.
—
Dylan Loeb McClain,
New York Times,
27 May 2023
See All Example Sentences for castle
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Noun
Earlier this week, Daniel Bishop, Jim Bishop's son and the caretaker of Bishop Castle, was seriously injured while working on a structure next to the castle.
—
Christa Swanson,
CBS News,
28 June 2026
Two years ago, the Man City phenom appeared in a 90-second spot for the game that saw him get recruited to storm a castle teeming with goblins, dragons and impish skeletons.
—
Anthony Crupi,
Sportico.com,
26 June 2026
Verb
The proactive Axar Patel hit an aggressive 27 before being castled by Nathan Ellis.
—
Tim Ellis,
Forbes,
4 Mar. 2025
For example, pawns could not move two squares on their first turn, and there was no similar rule for castling.
—
Dylan Loeb McClain,
New York Times,
27 May 2023
See All Example Sentences for castle
Cite this Entry
“Castle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/castle. Accessed 1 Jul. 2026.
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