- an armoured compartment in a ship or fortification in which guns are mounted
WordReference Random House Unabridged Dictionary of American English © 2026
case•mate
(kās′māt′),USA pronunciation n.
case′mat′ed, adj.
- Militaryan armored enclosure for guns in a warship.
- Militarya vault or chamber, esp. in a rampart, with embrasures for artillery.
- Old Italian casamatta, alteration (by folk etymology) of Greek chásmata embrasures, literally, openings, plural of chásma chasm
- Middle French
- 1565–75
Collins Concise English Dictionary © HarperCollins Publishers::
casemate /ˈkeɪsˌmeɪt/ n