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Castile

American  
[ka-steel] / kæˈstil /

noun

  1. Spanish Castilla.  a former kingdom comprising most of Spain.

  2. Also called Castile soap.  a variety of mild soap, made from olive oil and sodium hydroxide.

  3. any hard soap made from fats and oils, often partly from olive oil.

Castile British  
/ kæˈstiːl, kasˈtiʎa /

noun

  1. a former kingdom comprising most of modern Spain: originally part of León, it became an independent kingdom in the 10th century and united with Aragon (1469), the first step in the formation of the Spanish state

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

For Allen, after years of street protests decrying the killings of Philando Castile and George Floyd, he’s already writing for his Nur-D project, documenting this perilous, invigorating moment of resisting ICE in his city.

From Los Angeles Times • Jan. 30, 2026

Sunday's vote will be followed by regional elections in Andalusia, Aragon, and Castile and Leon during the first half of 2026.

From Barron's • Dec. 21, 2025

Castile and León is the most affected area, with local media station Radio 5 reporting on Monday that the air is "unbreathable" due to the smoke.

From BBC • Aug. 18, 2025

The elder Thompson became a Black Lives Matter activist following the police killing of his friend, Philando Castile, in suburban St. Paul in 2016.

From Seattle Times • Jun. 20, 2023

He kept the minds of the barons of Castile occupied with this, so that, concentrating on that war, they did not consider rebellion.

From "The Prince" by Niccolò Machiavelli

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.