Definition of Dewey Decimal Classification in English:

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Dewey Decimal Classification

Pronunciation: /ˌdo͞oē ˌdes(ə)məl ˌklasəfəˈkāSH(ə)n/
(also Dewey system)


An internationally applied decimal system of library classification that uses a three-figure code from 000 to 999 to represent the major branches of knowledge, and allows finer classification to be made by the addition of further figures after a decimal point.
Example sentences
  • Based on such an analysis, Orom has been able to discern a dominant view in, for example, the Library of Congress and Dewey decimal classifications.
  • It's like having a librarian who doesn't read books or understand the Dewey system categorising your reading and telling you what you can read based on their worthless biases.
  • This is a series of quizzes about how to use the Dewey system developed by the University of Texas at Austin.


Late 19th century: named after Dewey, Melvil.

For editors and proofreaders

Syllabification: Dew·ey Dec·i·mal Clas·si·fi·ca·tion

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