encyclopedia

/ɪnˌsaɪkləˈpidiə/
noun
  1. A book or set of books containing articles on many subjects, usually arranged alphabetically.
    • The encyclopedia had a detailed entry on the history of aviation.
    • I found the answer to my question in the old encyclopedia on the library shelf.
    • She bought a new encyclopedia set for her children to use with their homework.
  2. A digital or online reference work that provides information on a wide range of topics.
    • The website functions as a free encyclopedia for science and technology.
    • He used a medical encyclopedia app to look up symptoms.
    • Wikipedia is the most famous online encyclopedia, with millions of articles.
  3. A comprehensive collection of information on a particular subject.
    • This cookbook is an encyclopedia of Italian cuisine.
    • The guide is an encyclopedia of hiking trails in the region.
    • Her diary became an encyclopedia of local folklore.
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