A metallic plate, usually of iron or steel, intended to be attached to the side of a ship or the outer wall of a fort, with the view of rendering it shot-proof.(noun)
The Century Dictionary (Public Domain)
Use "armor-plate" in a sentence
"It is a very thin veneer; but so wonderfully is man constituted that he squirms on his bit of achievement and believes he is garbed in armor-plate."
"Fernandez has installed 2,000 security cameras, quadrupled the police force, set up neighborhood watches and built his own intelligence service in a $65 million bid to "armor-plate" the district."
"Anton was going to make the presentation on Thursday, and we needed to armor-plate the result, which was sure to elicit lots of tough questions."