The most simplified definition of the term plural that includes all people who take the label is “someone who shares the same physical body with other individuals.” Such a group is sometimes referred to as a system, though many plural groups use different terminology. Because plurality can take many vastly different forms, it is difficult to expand this definition without excluding someone who might otherwise share characteristics or concerns with most other members of the community. It does seem this basic trait is the only thing groups of people who refer to themselves as plural universally share. In other words, there are many, many ways to be plural, and no two systems are the same even as far as basic characteristics. There are a lot of trends in the community, however, and various types within the umbrella term of plural that seem to be subsets.