secular UK /ˈsɛkjʊlə/US /ˈsɛkjələɹ/adjective 8noun 3forms 3 adjective8 •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 religious order. •Continuing over a long period of time.The long-term growth in population and income accounts for most secular trends in economic phenomena. •Relating to long-term non-periodic irregularities, especially in planetary motion or magnetic field. •(literary) Centuries-old, ancient. •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. •Unperturbed over time.The secular A and nonsecular B parts of hyperfine interaction for any particular frequencies ν_α and ν_β are derived from eqn.(21) by ... — 2000 noun3 •A layman, as distinguished from a clergyman. •A secular ecclesiastic, or one not bound by monastic rules.On further examination, I found the clergy, in general, persons of moderate minds and decorous manners : I include the seculars, and the regulars of both sexes — 1790 •A church official whose functions are confined to the vocal department of the choir. formsseculars · more secular · most secular