Definition: any number of entities (members) considered as a unit
Main entry: group, mathematical group
Definition: a set that is closed, associative, has an identity element and every element has an inverse
Main entry: group, radical, chemical group
Definition: (chemistry) two or more atoms bound together as a single unit and forming part of a molecule
Main entry: group
Definition: arrange into a group or groups
Usage: Can you group these shapes together?
Definition: form a group or group together