1. a flat piece of metal, wood, or stone with writing on it that is attached to a wall, building, or other surface as a memorial or marker
2. a sticky film of bacteria that forms on teeth
Usage: dental
3. a deposit of fatty material on the inner wall of an artery
Usage: medical

Examples

• The bronze plaque commemorated the soldiers who died in the war.
• A small plaque by the door identified the historic building.
• The dentist removed plaque from my teeth during the cleaning.
• Regular brushing helps prevent plaque buildup.
• Arterial plaque can lead to heart disease.
• The doctor explained how plaque blocks blood flow in arteries.