an internationally applied decimal system of library classification which 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.
late 19th century: named after Melvil Dewey (1851–1931), American librarian
Dewey Decimal Classification in other Oxford dictionaries
Definition of Dewey Decimal Classification in the US English dictionary
Dewey Decimal Classification, nearby words in English