# classification

/ˌkɫæsəfəˈkeɪʃən/ (US) · /klˌæsɪfɪkˈeɪʃən/ (UK) · CEFR C1 · Noun

Source: https://englishreference.com/word/classification
Updated: 2026-05-02

## Definition

the act of putting things into groups based on how they are similar. It helps you organize information so it is easier to understand or find later.

For teachers: the systematic arrangement of items into categories based on shared characteristics or criteria. Often implies a formal or scientific framework for organizing data.

## Examples

- The library uses a specific system for the classification of books.
- Biologists use a complex system of classification to group living organisms by their genetic similarities.
- The rapid evolution of digital media has challenged traditional classification systems, forcing archivists to develop more flexible categories for hybrid creative works.

## Usage notes

- Uncountable when referring to the general process; countable when referring to a specific category or a particular system of organization.

---

From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.