A surname from Old French. / A male given name transferred from the surname, of 1890s American usage.

One of 77 counties in Oklahoma, United States. County seat: Taloga. Named after George Dewey. / One of 66 counties in South Dakota, United States. County seat: Timber Lake. Named after William P. Dewey.

(US, derogatory) A generic name for a law firm, or occasionally any financial institution.

(poker) Three twos. (three cards ranked two; a three of a kind of twos)

Synonym of Dewey Decimal Classification

(library studies) A proprietary library classification system that allows new books to be added to a library in their appropriate location based on subject.

plural of Dewey Decimal System

Of or pertaining to Melvil Dewey (1851–1931), American librarian and educator, and inventor of the Dewey Decimal Classification.

A supporter of the ideas of John Dewey.

A proponent of Deweyism.