What is the definition of classify?

Classify

* verb

To categorize into a class or division, especially on the basis of shared characteristics

"They classified the different plants they saw"

"This type of disease would most likely be classified as terminal."

synonyms:

Categorize; group; list; sort; order; grade; label; put into class/pigeonhole.

Antonyms:

Disorder; disorganize; scramble; jumble; confuse; mix up