Irreligion: Absence, indifference to, or rejection of religion

The term covers all those who answer "none" to questionnaires which ask people about their religion. In the social survey world, they are called "the nones". The term irreligious is an umbrella term, for atheists, agnostics, deists and ignostics.

Irreligion takes many forms, ranging from the casual and unaware to full-fledged philosophies such as atheism, agnosticism, ignosticism, deism and irreligious theism. All these views can also be alternatively called secular humanism.

Irreligion may be a purely naturalist worldview which denies a belief in anything supernatural. The broadest and loosest definition, is the lack of religious identification (attendance at church, temple etc.). The broadest definition is not belonging to any religion, which still does not exclude belief in any supernatural forces, which some irreligious people may believe in. The narrowest and strictest is subscribing to "positive atheism". That might be described as a willingness to state rejection of a deity absolutely. Public statements of belief can be, and are, tailored to the various social climates.

There are, at least five different groups of "not religious" people:

• Agnostics
• Atheists
• Deists
• irreligious theists
• Ignosticists