1. a person or thing that classifies or categorizes items into groups
2. a word or morpheme that indicates the class or category of a noun
Usage: linguistics
3. an algorithm or system that automatically assigns data to predefined categories
Usage: computing; machine learning

Examples

• The librarian worked as a book classifier, organizing volumes by subject.
• In Chinese, measure words serve as classifiers for different types of objects.
• The email classifier automatically sorted messages into spam and legitimate folders.
• Machine learning classifiers can identify patterns in large datasets.
• The image classifier correctly identified 95% of the photographs.
• Japanese uses specific classifiers when counting different items.
• The document classifier organized files by topic and importance.