Group
A Group can be described as two or more people or things that are organized in a way that define them together. A group can be organized or identified in many ways. They can be grouped because they are in close proximity to another (everyone on one side of the room is group A), because they share similar traits (all redheads could be considered a group, fruits and vegetables are differing groups of food), or are from the same place (Canadians are a group of people who are from Canada).
See also: More clinical definition of Group or Group Counseling.