A small crowd or assemblage; a cluster.

群；簇；团。

The chief division of a geological system.

【地】界。

A number of persons holding common views.

持有共同观点之一群人。

Air Force operational unit higher than a squadron.

(空军)空军中队(作战单位，比飞行小队要大)。

To form into a collection or class.

集合；类集。

To combine into a class.

合为一类。