A fortified enclosure for artillery on a warship.(noun)
An armored compartment for artillery on a rampart.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "casemate" in a sentence
"The colonel, signing to his guests to follow, led the way to the apartment occupied jointly by himself and the major, which, although only a kind of casemate hollowed in the rock, nevertheless wore a general air of comfort."
"The barred cell at casemate No. 11 once belonged to convicted killer William H. Howe before he was hanged Aug. 26, 1864."
"Assuming this was Shishak's destruction of 930 BC then that pretty much clinches the story, without even getting into the casemate wall issue or the pottery."