secularism

noun

1. secular spirit or tendency, especially a system of political or social philosophy that rejects all forms of religious faith and worship.
2. the view that public education and other matters of civil policy should be conducted without the introduction of a religious element.

noun

1. philosophy a doctrine that rejects religion, esp in ethics
2. the attitude that religion should have no place in civil affairs
3. the state of being secular

n.“doctrine that morality should be based on the well-being of man in the present life, without regard to religious belief or a hereafter,” 1846, from secular + -ism.