Secularly

adjective
1.
of or relating to worldly things or to things that are not regarded as religious, spiritual, or sacred; temporal:
secular interests.
2.
not pertaining to or connected with religion (opposed to sacred):
secular music.
3.
(of education, a school, etc.) concerned with nonreligious subjects.
4.
(of members of the clergy) not belonging to a religious order; not bound by monastic vows (opposed to regular).
5.
occurring or celebrated once in an age or century:
the secular games of Rome.
6.
going on from age to age; continuing through long ages.
noun
7.
a layperson.
8.
one of the secular clergy.
adjective
1.
of or relating to worldly as opposed to sacred things; temporal
2.
not concerned with or related to religion
3.
not within the control of the Church
4.
(of an education, etc)

having no particular religious affinities
not including compulsory religious studies or services

5.
(of clerics) not bound by religious vows to a monastic or other order
6.
occurring or appearing once in an age or century
7.
lasting for a long time
8.
(astronomy) occurring slowly over a long period of time: the secular perturbation of a planet’s orbit
noun
9.
a member of the secular clergy
10.
another word for layman
secular [(sek-yuh-luhr)]

Not concerned with religion or religious matters. Secular is the opposite of sacred.

Note: Secularization refers to the declining influence of religion and religious values within a given culture. Secular humanism means, loosely, a belief in human self-sufficiency.