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1. Any number of entities (members) considered as a unit
   - group
    
2. The activity of putting things together in groups
    
3. A system for classifying things into groups
   - pigeonholing

1. Arrange into a group or groups
   "Can you group these shapes together?"
    
2. Form a group or group together
   - aggroup

Derived forms: groupings

Type of: abstract entity, abstraction, activity, assemble, assort, class, classification system, classify, foregather, forgather, gather, meet, separate, sort, sort out

Encyclopedia: Grouping