noun
A flat plate, often metal, bearing an inscription such as a name, title, or commemorative text. Used for door signs, memorials, or equipment labels.
玄関に会社の銘板がかかっている。
The company nameplate is displayed at the entrance.
記念の銘板が壁に取り付けられた。
A commemorative plaque was mounted on the wall.
表札 is specifically a nameplate for a house or room, usually showing the resident's name, while 銘板 is broader and can be used for any inscribed plate, including memorials and equipment labels.
看板 is a signboard, typically larger and used for advertising or shop signs, whereas 銘板 is a smaller, more formal inscribed plate.
Compound of 銘 (inscription) and 板 (board, plate). The irregular form 銘盤 uses 盤 (tray, board) instead of 板, but the standard spelling is 銘板.