refers to man-developed, man-based, and man-focused solutions and
activities. Whether it is a religion or a spiritual pursuit is a
separate issue (does it make Man into his own god?). It is a way of
life that strives for independence from religious or god-centered
worship and motivations. If it must put up with religion for pragmatic
purposes, then humanists will tell you that all religions are
equally valid and true, as are all cultures.
I, II, III - American Humanist Society