noun
classification
klas-ih-fih-KAY-shuhn/ˌklæsɪfɪˈkeɪʃn/
The sorting of things into defined categories.
The leaves' classification separates them into groups according to their different shapes.

Etymology
The pieces express the action of forming classes: grouping things by shared characteristics. The meaning also extended to the result of that action—the arrangement or system of categories produced.
In context
making racial classification and segregation a nationwide meticulously enforced law that controlled every part of life. During apartheid, South Africans were classified into rigid racial categories. White, the ruling privileged class
More examples
- Each document receives a security classification.
- The new evidence changed the animal's classification.
- The library uses a subject-based classification system.
Forms
classification · classifications
Similar words
- identification
- Identification determines what something is; classification places it within a category system.