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English definition of “plaque”

plaque

noun uk   /plɑːk/ /plæk/ us    /plæk/

plaque noun (FLAT OBJECT)

[C] a flat piece of metal, stone, wood, or plastic with writing on it that is attached to a wall, door, or other object: There was a brass plaque outside the surgery listing the various dentists' names. The First Lady unveiled a commemorative plaque.
See also
blue plaque UK a plaque on the wall of a house that shows that someone famous once lived there: The blue plaque said 'Charles Darwin, biologist, lived here'.

plaque noun (SUBSTANCE)

[U] a substance containing bacteria that forms on the surface of teeth
(Definition of plaque from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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