The word mimesis or also mimesis, comes from Latin roots "mimēsis", and this from the Greek "μίμησις" formed lexically with "mimos" which means "imitation", "mime" and the suffix "sis" which means "formation", "Impulse" or "conversion". The word mimesis has two possible meanings that refer to imitation, these are, one to refer to the imitation or worship that an individual performs of those gestures, gestures, grimaces, signs, way of speaking or acting and movements that another makes. For its part, the other meaning refers to the cult or imitation that is made of nature as an artistic purpose, in aesthetics and in classical poetics.
Mimesis is a term that has been used since the time of Aristotle and Plato, which since then has been called the imitation of nature as an essential purpose of art. Continuing in the philosophical context, the Greek Plato stated that mimesis was only the sensory appearance of those exterior images of things, which occur in the opposite world to that of ideas. So when you talk about this imitation of reality, it is just a copy of the world of ideas. After this, this character renounces the imitation or the reference to mimesis of the world to address the story or narration of the story called diegesis.
The concept of mimesis was greatly developed through the genre of still life, where the painter found in the immobility of a model, a benefit of enhancing in the presence of an audience his talent, ability or disposition to duplicate reality, although said images can be diegetic, that is, full of fiction.