Noun: Dewey decimal system
- A system used by libraries to classify nonfictional publications into subject categories; the subject is indicated by a three-digit numeral and further specification is given by numerals following a decimal point; publications are shelved by number
"The librarian used the Dewey decimal system to organize the new books";
- Dewey decimal classification, decimal system of classification
Type of: classification system
Encyclopedia: Dewey decimal system