exposition - definition and synonyms

noun 

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/ˌekspəˈzɪʃ(ə)n/
singularexposition
pluralexpositions
  1. 1
    [countable/uncountable] formal a detailed explanation of something such as an idea or process, or the action of giving such an explanation
    exposition of:

    his exposition of recent developments in the teaching of history

  2. 2
    [countable] a public event or show of industrial products or technology