encyclopedia - definition and synonyms

 
noun [countable] 

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/ɪnˌsaɪkləˈpiːdiə/
singularencyclopedia
pluralencyclopedias
  1. a reference resource which provides information about many different subjects or about one particular subject. An encyclopedia may be published as a single book, a series of books, or as a digital product such as a website or an app.

    an encyclopedia of science