In social psychology, two or more people who interact or communicate, perceive themselves as forming a unity, and typically share at least one common goal.
In group insurance, a body of subscribers eligible for group insurance by virtue of some common identifying attribute, such as common employment by an employer, or membership in a union, association or other organization. Groups considered for insurance are usually larger than nine persons.
Several people, animals or things which are all close together.
A number of similar objects or structures considered together (e.g., bacteria with similar metabolic characteristics). Atomic molecules and compounds with similar structures or properties are classified with certain groups.