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A plate bearing a person's name; specifically, a plate of metal, as silver-plate or polished brass, upon which a person's name is engraved, placed upon the door or the door-jamb of a residence or a place of business.
(noun)
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A metal plate bearing the name of the manufacturer, and often giving the size and capacity of the machine, placed on a machine-tool, engine, dynamo, or other machine.
(noun)
The Century Dictionary (Public Domain)