BREAST'PLATE, n. breast and plate.
1. Armor for the breast.
2. A strap that runs across a horse's breast.
3. In Jewish antiquity, a part of the vestment of the high priest, consisting of a folded piece of the rich embroidered stuff of which the ephod was made. It was set with twelve precious stones, on which were engraved the names of the twelve tribes.
The King James Bible has stood its ground for nearly 400 years. However, during that time the English language has changed, and with it the meanings of some words it used. Here are more than 6,500 words whose definitions have changed since 1611.Wikipedia
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