D defs.my
Entry 4 senses Webster, 1913

Breastplate

/brĕs'-tplātˌ/ · Breast·plate · IPA /ˈbɹɛstˌpleɪt/
01 n. A plate of metal covering the breast as defensive armor.
  1. 1.
    A plate of metal covering the breast as defensive armor.
    “Before his old rusty breastplate could be scoured, and his cracked headpiece mended.” Swift.
  2. 2.
    A piece against which the workman presses his breast in operating a breast drill, or other similar tool.
  3. 3.
    A strap that runs across a horse's breast.
  4. 4.
    A part of the vestment of the high priest, worn upon the front of the ephod. It was a double piece of richly embroidered stuff, a span square, set with twelve precious stones, on which were engraved the names of the twelve tribes of Israel. See Ephod.(Jewish Antiq.) See: Ephod