What is a difference between objective and non objective?

According to Princeton, here are some definitions for "composition:"

• the spatial property resulting from the arrangement of parts in relation to each other and to the whole; "harmonious composition is essential in a ...
• constitution: the way in which someone or something is composed
• a mixture of ingredients
• musical composition: a musical work that has been created; "the composition is written in four movements"
• writing: the act of creating written works; "writing was a form of therapy for him"; "it was a matter of disputed authorship"
• typography: art and technique of printing with movable type
• an essay (especially one written as an assignment); "he got an A on his composition"
• something that is created by arranging several things to form a unified whole; "he envied the composition of their faculty"