In this study, lexical and terminological meanings of the term “nature” were analyzed and some Peripatetical Islamic philosophers’ opinions about this term were included. A comparison was made between the words “tabiat” and “doğa” which are used in Turkish language to meet the term “nature”. The realm of existence which Peripatetical Islamic philosophers have used “nature” in as a noun was explained. Debate between Ibn Sīnā and Ibn Rushd (Averroes) about the necessity of proving the term “nature” was mentioned. Ibn Sīnā's views on what “nature” portends in terms of being a source of motion and duration in objects were presented in comparison with Aristotle. Later definitions which are made by philosophers for “nature” as a term were presented. Peripatetical Islamic philosophers’ definition of the term “nature” which has a critical role in Islamic philosophy and the way they use it differentiates from that of Aristotle’s. The term “nature” which they especially use to explain every kind of becoming and motion enables to connect all reason to Allah in aspects of etymology. And it is also known that the term “nature” serves as a basis for differentiation between physics and metaphysics. The purpose of this article is to clarify the possible usages of the term “nature” in relation to new theories.