D defs.my
Entry 1 sense Webster, 1913

Armor-plated

· Ar·mor-plat·ed · IPA
01 a. Covered with defensive plates of metal, as a ship of war; steel-clad.
  1. 1.
    Covered with defensive plates of metal, as a ship of war; steel-clad.
    “This day will be launched . . . the first armor-plated steam frigate in the possession of Great Britain.” — Times (Dec. 29, 1860).