group-n; 3 Senses

Sense Number 1: collection

Commentary: any number of entities considered as a unit

Examples:
A large group walked in.
The whole group of stuffed animals were piled on the bed.
Fido's favorite musical group is called 'Cats Stink'.

Mappings:
WordNet 2.0 Sense Numbers: 1

Sense Number 2: chemical group

Commentary: radical - two or more atoms bound together as a single unit and forming part of a molecule

Examples:
Chlorine is in a chemical group called halogens.

Mappings:
WordNet 2.0 Sense Numbers: 2

Sense Number 3: a set

Commentary: a set that is closed, associative, has an identity element and every element has an inverse

Examples:
The group in problem five includes the numbers 7, 3, and 5.

Mappings:
WordNet 2.0 Sense Numbers: 3