naturalism

noun
1
a style of art or writing that shows people, things and experiences as they really are
طبیعت‌گرایی, طبیعی‌گرایی, رئالیسم طبیعت‌گرا
2
the theory that everything in the world and life is based on natural causes and laws, and not on spiritual or supernatural ones
طبیعت‌گرایی, ناتورالیسم, اصالت طبیعت