• synonyms


  1. an armored enclosure for guns in a warship.
  2. a vault or chamber, especially in a rampart, with embrasures for artillery.
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Origin of casemate

1565–75; < Middle French < Old Italian casamatta, alteration (by folk etymology) of Greek chásmata embrasures, literally, openings, plural of chásma chasm
Related formscase·mat·ed, adjectiveun·case·mat·ed, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for casemate

Historical Examples

  • Two days afterwards he found himself in a casemate of the fort of Bicetre.

    The Fat and the Thin

    Emile Zola

  • He had felt hungry in the casemate, and the pangs of hunger had never since left him.

  • It mounts fifteen guns on the top, and fifteen guns in casemate.

    The Life of Gordon, Volume I

    Demetrius Charles Boulger

  • It was with some emotion that I reached the casemate in which Mr. Davis was confined.

  • A casemate of iron plates has been provided for the gunners.

    The Civil War Through the Camera

    Henry W. (Henry William) Elson

British Dictionary definitions for casemate


  1. an armoured compartment in a ship or fortification in which guns are mounted
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Derived Formscasemated, adjective

Word Origin

C16: from French, from Italian casamatta, perhaps from Greek khasmata apertures, plural of khasma chasm
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