I’ve just come across this phrase ‘non-religion’ as an academic term.
The two concepts of nonreligion and secularity are intended to summarise all positions which are necessarily defined in reference to religion but which are considered to be other than religious. Thus, the Nonreligion and Secularity Research Network’s research agenda is inclusive of a range of perspectives and experiences, including the atheistic, agnostic, religiously indifferent or areligious, as well as most forms of secularism, humanism and, indeed, aspects of religion itself. It also addresses theoretical and empirical relationships between nonreligion, religion and secularity.
There is a new website to coordinate research in this area.
The Non-religion and Secularity Research Network (NSRN) is an international and interdisciplinary network of researchers; the network was founded in 2008 to centralise existing research on the topic of non-religion and secularity and to facilitate discussion in this area.
This website – launched in December 2011 – is our new home on the internet. To find out more about the changes to the site, please have a look around, or see the ‘About Us’ section for more information. Meanwhile, we hope you enjoy the site and welcome your feedback and suggestions for additions and improvements.
See what you think. I like the inconsistent use of the hyphen; as if there is an unresolved philosophical/sociological debate here.

This looks like avery interesting site and one that I will keep visiting regularly to keep updated.
What next! How can you study the absence of something?
I wonder if non_religion includes the growing number of people who have rejected one church or another but consider themselves to be spiritual (Eckhart Tolle fans etc)?
I enjoyed the Einstein clip!