noun 1. religion based on principles derived solely from reason and the study of nature.
noun, Immunology. 1. .
plural noun 1. the natural wealth of a country, consisting of land, forests, mineral deposits, water, etc. plural noun 1. naturally occurring materials such as coal, fertile land, etc, that can be used by man Factors of production not created (though harnessed) by effort. Minerals and fossil fuels are examples of natural resources.
noun 1. any right that exists by virtue of natural law.