Lèi bié means 'category' or 'classification'—a way of grouping things that share common features. The first character lèi means 'kind' or 'type', and the second character bié means 'to distinguish' or 'to differentiate'. Together, they express the idea of sorting items into distinct groups based on shared characteristics. This word is formal and commonly used in academic, administrative, scientific, and organizational contexts—not in casual daily speech.

You’ll often see lèi bié in textbooks, databases, product labels, government forms, and museum displays—for example, when classifying animal species, document types, or software functions. It implies intentionality and systematic organization, unlike more general words like zhǒng lèi (kind/type), which is looser and more colloquial. While it can be used for any domain, it’s especially frequent in biology, library science, and data management.