Clear language becomes harder when experience is diverse.
Many ordinary words can be defined with little disagreement. Terms connected with belief, identity and community are often more complicated because they describe varied human experiences rather than a single object.
Religious traditions developed within different cultures and historical settings. Communities may use the same term for different ideas, or different terms for closely related ideas. A definition that fits a tradition centered on a deity may not adequately describe a non-theistic tradition, an Indigenous practice or a worldview organized around ethics and community.
Differences also arise because dictionaries, scholars, courts, religious institutions and individual believers ask different questions. One source may focus on belief, another on ritual, another on social organization, and another on a person's relationship to what they consider sacred or ultimately meaningful.
Why careful definitions matter
When people assume that their preferred meaning is the only valid one, discussion can become confusing. A group may be included under one definition and excluded under another. In law and public policy, those boundaries can also affect how freedom of conscience and equal treatment are understood.
Productive comparison begins by stating which definition is being used, acknowledging its limits and avoiding the assumption that every community understands itself in the same way.