secular

A secular ecclesiastic, or one not bound by monastic rules.

A church official whose functions are confined to the vocal department of the choir.

A layman, as distinguished from a clergyman.

Not specifically religious; lay or civil, as opposed to clerical.

Temporal; worldly, or otherwise not based on something timeless.

Not bound by the vows of a monastic order.

“secular clergy in Catholicism”

Happening once in an age or century.

“The secular games of ancient Rome were held to mark the end of a saeculum and the beginning of the next.”

Continuing over a long period of time, long-term.

“The long-term growth in population and income accounts for most secular trends in economic phenomena.”

Centuries-old, ancient.

Relating to long-term non-periodic irregularities, especially in planetary motion or magnetic field.

(atomic physics) Unperturbed over time.