classification
/ˌklæsɪfɪˈkeɪʃən/noun
mass noun
1- the action or process of classifying something according to shared qualities or characteristics分类：
the classification of disease according to symptoms.
根据症状对疾病的分类。
1.1
- Biology the arrangement of animals and plants in taxonomic groups according to their observed similarities (including at least kingdom and phylum in animals, division in plants, and class, order, family, genus, and species)【生】（根据观察到的共同点对动植物的）分类（包括动植物的界、门、纲、目、科、属、种）。
1.3
- count noun a category into which something is put种类, 级别。