nature

nature /ˈneɪtʃɚ/ noun
plural natures
nature
/ˈneɪtʃɚ/
noun
plural natures
Britannica Dictionary definition of NATURE
1 
[noncount] also Nature
a  : the physical world and everything in it (such as plants, animals, mountains, oceans, stars, etc.) that is not made by people
b  : the natural forces that control what happens in the world
— see also call of nature, freak of nature, mother nature
2 
: the way that a person or animal behaves : the character or personality of a person or animal
[count]
[noncount]
— see also good-natured, human nature, ill-natured, second nature
3 
: a basic quality that something has
[count]
— usually singular — often + of
[noncount]
4 
[singular] : a particular kind of thing

get/go back to nature

also return to nature
: to spend time living in a simple way without modern machines, electricity, etc.

let nature take its course

: to allow something to happen without trying to control it