A plaque is a sign that memorializes a person or event, such as the plaque on a building noting the person it's named after or the year it was built.

Plaque comes from the French word for "plate," meaning not a dinner plate, but a little brass or tin plate that can be mounted on a wall. If you take a tour of Civil War battlefields, you'll find that historical societies often use plaques to commemorate soldiers or particular events. Plaque is also a hard buildup in the body, like the plaque on your teeth that the dentist likes to scrape off.

Primary Meanings of plaque

a memorial made of brass
(pathology) a small abnormal patch on or inside the body
Full Definitions of plaque

n a memorial made of brass

brass, memorial tablet
Type of:
memorial, monument
a structure erected to commemorate persons or events

n (pathology) a small abnormal patch on or inside the body

amyloid plaque, amyloid protein plaque
a plaque consisting of tangles of amyloid protein in nervous tissue (a pathological mark of Alzheimer's disease)
arterial plaque
a fatty deposit inside an arterial wall; characteristic of atherosclerosis
bacterial plaque, dental plaque
a film of mucus and bacteria deposited on the teeth that encourages the development of dental caries
Type of:
dapple, fleck, maculation, patch, speckle, spot
a small contrasting part of something

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