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Definition of plaque noun from the Oxford Advanced Learner's Dictionary

plaque

noun
 
/plæk/,
 
/plɑːk/
 
/plæk/
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  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.
    see also blue plaque
    Extra Examples
    • Some Latin words were engraved on the plaque.
    • The local historical society put up a plaque at the site of the battle.
    • There is a commemorative plaque to the artist in the village hall.
    • There is a commemorative plaque to those lost at sea.
    • a plaque on the wall
    Topics Buildingsc2
    Oxford Collocations Dictionaryadjective
    • commemorative
    • memorial
    • brass
    verb + plaque
    • put up
    • unveil
    • present (somebody with)
    plaque + verb
    • be dedicated to somebody
    • commemorate somebody/​something
    • honour/​honor somebody
    preposition
    • on a/​the plaque
    • plaque on
    • plaque to
    See full entry
  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
    Extra Examples
    • Brushing prevents a build-up of plaque and tartar on the teeth.
    • Gum disease happens when plaque builds up.
    Topics Bodyc2
    Oxford Collocations Dictionaryadjective
    • dental
    verb + plaque
    • remove
    plaque + verb
    • build up
    phrases
    • a/​the build-up of plaque
    See full entry
  3. Word Originmid 19th cent.: from French, from Dutch plak ‘tablet’, from plakken ‘to stick’.
See plaque in the Oxford Advanced American Dictionary

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