- (RP) IPA: /plɑːk/, /plæk/
- (Northern England, Scotland) IPA: /plak/
- (GA) IPA: /plæk/, [pʰl̥æk]
- (Aus) IPA: /plaːk/
- (countable) Any flat#Adjective|flat, thin piece of clay, ivory, metal, etc., used for ornament#Noun|ornament, or for paint#Verb|painting picture#Noun|pictures upon, as a dish#Noun|dish, plate#Noun|plate, slab, etc., hung upon a wall; also, a smaller decoration wear#Verb|worn by a person, such as a brooch.
- (countable) A piece of flat metal with writing#Noun|writing on it, attached to a building#Noun|building, monument, or other structure#Noun|structure to remind people of a person or an event.
- (countable) A small card representing an amount of money, used for betting in casinos; a sort of gaming chip.
- (countable, biology) A clearing#Noun|clearing in a bacterial lawn caused by a virus.
- (countable, musical instruments) In the Hornbostel–Sachs classification system: any flat, thin musical instrument.
- blown plaques concussion plaques
- (countable, pathology) A broad#Adjective|broad patch#Noun|patch of abnormal tissue distinguishable from surrounding#Adjective|surrounding tissue, especially a broad papule on the skin#Noun|skin.
- (countable, uncountable, pathology) An abnormal accumulation of material#Noun|material in or on an organ of the body, often associate#Verb|associated with disease.
- amyloid plaque pleural plaque senile plaque