a process existing in or produced by nature (rather than by the intent of human beings)
a particular course of action intended to achieve a result
in accordance with nature; relating to or concerning nature
existing in or produced by nature; not artificial or imitation
existing in or in conformity with nature or the observable world; neither supernatural nor magical
(psychology) the performance of some composite cognitive activity; an operation that affects mental contents
subject to a process or treatment, with the aim of readying for some purpose, improving, or remedying a condition
