The term "nonsecular" is not a commonly used term in contemporary English language. It is possible that the intended meaning of "nonsecular" is "not secular", which would suggest a reference to something related to religion or spirituality.
In that case, something that is nonsecular would be related to religious or spiritual beliefs or practices. For example, a nonsecular ceremony could be a religious or spiritual ceremony, while a nonsecular book could be a religious or spiritual text.
It's worth noting that "nonsecular" is not a commonly used term, and other phrases such as "religious" or "spiritual" are more commonly used to describe things related to faith or belief.