Looking for the meaning or definition of the word plaque? Here's what it means.
Noun
Any flat, thin piece of metal, clay, ivory, or the like, used for ornament, or for painting pictures upon, as a slab, plate, dish, or the like, hung upon a wall; also, a smaller decoration worn on the person, as a brooch.
A piece of flat metal with a writing on it, attached to a building to remind people of a person or an event.