Define natural? 
1nat·u·ral
adjective \ˈna-chə-rəl, ˈnach-rəl\
Definition of NATURAL
1
: based on an inherent sense of right and wrong <natural justice>
2
a : being in accordance with or determined by nature
b : having or constituting a classification based on features existing in nature
3
a (1) : begotten as distinguished from adopted; also : legitimate (2) : being a relation by actual consanguinity as distinguished from adoption <natural parents>
b : illegitimate <a natural child>
4
: having an essential relation with someone or something : following from the nature of the one in question <his guilt is a natural deduction from the evidence>
5
: implanted or being as if implanted by nature : seemingly inborn <a natural talent for art>
6
: of or relating to nature as an object of study and research
7
: having a specified character by nature <a natural athlete>
8
a : occurring in conformity with the ordinary course of nature : not marvelous or supernatural <natural causes>
b : formulated by human reason alone rather than revelation <natural religion> <natural rights>
c : having a normal or usual character <events followed their natural course>
9
: possessing or exhibiting the higher qualities (as kindliness and affection) of human nature <a noble … brother … ever most kind and natural — Shakespeare>
10
a : growing without human care; also : not cultivated <natural prairie unbroken by the plow>
b : existing in or produced by nature : not artificial <natural turf> <natural curiosities>
c : relating to or being natural food
11
a : being in a state of nature without spiritual enlightenment : unregenerate <natural man>
b : living in or as if in a state of nature untouched by the influences of civilization and society
12
a : having a physical or real existence as contrasted with one that is spiritual, intellectual, or fictitious <a corporation is a legal but not a natural person>
b : of, relating to, or operating in the physical as opposed to the spiritual world <natural laws describe phenomena of the physical universe>
13
a : closely resembling an original : true to nature
b : marked by easy simplicity and freedom from artificiality, affectation, or constraint
c : having a form or appearance found in nature
14
a : having neither flats nor sharps <the natural scale of C major>
b : being neither sharp nor flat
c : having the pitch modified by the natural sign
15
: of an off-white or beige color
