Classification (noun)

1. The act or process of arranging things or concepts into groups or categories based on characteristics or qualities they have in common.
2. A system of grouping things or concepts into categories or classes.
3. The category or class to which something belongs.

Origin:

The word 'classification' comes from the latin 'classificatio' which means 'the act of arranging into classes or categories.'.

Examples:

1. The classification of living things into species and genera is a fundamental task in biology.
2. The library uses the Dewey Decimal system for its books' classification.
3. The classification of the disease was a major challenge for the medical community.
4. The new product was classified as a luxury item.
5. The classification of the rocks is important in understanding geological processes.