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WordNet-OnlineFree dictionary and thesaurus of English. Definitions, synonyms, antonyms and more...
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Noun grouping has 3 senses
group, grouping - any number of entities (members) considered as a unit--1 has particulars:
 |  | arrangement; straggle; kingdom; biological group; community, biotic community; world, human race, humanity, humankind, human beings, humans, mankind, man; people; social group; collection, aggregation, accumulation, assemblage; edition; electron shell; ethnic group, ethnos; race; association; subgroup; sainthood; citizenry, people; population; multitude, masses, mass, hoi polloi, people; varna; circuit; system, scheme; series; actinoid, actinide, actinon; rare earth, rare-earth element, lanthanoid, lanthanide, lanthanon; halogen | 
grouping - the activity of putting things together in groups--2 is a kind of activity
 --2 has particulars:
grouping, pigeonholing - a system for classifying things into groups--3 is a kind of classification system
 
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