#1 group n. [grouping] any number of entities (members) considered as a unit. wn
#2 group v. arrange into a group or groups; "Can you group these shapes together?". wn
#3 group n. [radical, chemical group] (chemistry) two or more atoms bound together as a single unit and forming part of a molecule. wn
#4 group v. [aggroup] form a group or group together. wn
#5 group n. [mathematical group] a set that is closed, associative, has an identity element and every element has an inverse. wn
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