Group (online social networking)
WordNet

noun


(1)   Any number of entities (members) considered as a unit
(2)   A set that is closed, associative, has an identity element and every element has an inverse
(3)   (chemistry) two or more atoms bound together as a single unit and forming part of a molecule

verb


(4)   Arrange into a group or groups
"Can you group these shapes together?"
(5)   Form a group or group together
 
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