Dictionary.net

the doctrine that the world can be understood in scientific terms without recourse to spiritual or supernatural explanations

A state of nature; conformity to nature.

The theory that art or literature should conform to nature; realism; also, the quality, rendering, or expression of art or literature executed according to this theory.

A state of nature; conformity to nature.

The theory that art or literature should conform to nature; realism; also, the quality, rendering, or expression of art or literature executed according to this theory.

Mere state of nature.

n. Natural condition or quality; conformity to nature;- knowledge or system of religion derived from natural reason;- the system of those who deny supernatural agency; divine revelation, miracles, prophecies, &c.