classification
noun uk/ˌklæs.ɪ.fɪˈkeɪ.ʃən/ us/ˌklæs.ə.fəˈkeɪ.ʃən/
C2 [ U ]将…分类，将…归类；把…分级
the act or process of dividing things into groups according to their type
Do you understand the system of classification used in ornithology? 你懂鸟类学的分类体系吗？
C2 [ C ]类别，等级，门类
a group that something is divided into