We found one dictionary that defines the word classification systems:

General (1 matching dictionary)

1. classification systems: Vocabulary.com

(Note: See classification_system as well.)

Definitions from WordNet (classification system) ▸ noun:  a system for classifying things ▸ Also see classification_system ▸ Words similar to classification systems ▸ Usage examples for classification systems ▸ Idioms related to classification systems ▸ Wikipedia articles (New!) ▸ Words that often appear near classification systems ▸ Rhymes of classification systems ▸ Invented words related to classification systems