American English

Definition of plaque noun from the Oxford Advanced American Dictionary



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  1. 1[countable] a flat piece of stone, metal, etc., usually with a name and dates on, attached to a wall in memory of a person or an event A bronze plaque marks the house where the poet was born.
  2. 2[uncountable] a soft substance that forms on teeth and encourages the growth of harmful bacteria Remove plaque by brushing your teeth regularly. compare scale
See the Oxford Advanced Learner's Dictionary entry: plaque

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