We found one dictionary that defines the word dewey decimal systems:

General (1 matching dictionary)

1. Dewey Decimal Systems: Collins English Dictionary

(Note: See dewey_decimal_system as well.)

Definitions from Wiktionary (Dewey Decimal System) ▸ noun:  Synonym of Dewey Decimal Classification ▸ Also see dewey_decimal_system ▸ Words similar to dewey decimal systems ▸ Usage examples for dewey decimal systems ▸ Idioms related to dewey decimal systems ▸ Wikipedia articles (New!) ▸ Words that often appear near dewey decimal systems ▸ Rhymes of dewey decimal systems ▸ Invented words related to dewey decimal systems