Definitions of composition on the Web:

• 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"
  wordnetweb.princeton.edu/perl/webwn

• In mathematics, function composition is the application of one function to the results of another. For instance, the functions and can be composed by computing the output of f when it has an argument of g(x) instead of x.
  en.wikipedia.org/wiki/Composition_(mathematics)

• The term dance composition is used to describe the practice and teaching of choreography and the navigation or connection of choreographic structures.
  en.wikipedia.org/wiki/Composition_(dance)

• In mathematics, a composition of a positive integer n is a way of writing n as a sum of strictly positive integers. ...
  en.wikipedia.org/wiki/Composition_(number_theory)

• A fallacy of composition arises when one infers that something is true of the whole from the fact that it is true of some part of the whole (or even of every proper part). ...
  en.wikipedia.org/wiki/Composition_(logical_fallacy)

• The term Composition, in written language, refers to the skill or art of creating written works or pieces of literature. ...
  en.wikipedia.org/wiki/Composition_(language)

• In computer science, object composition (not to be confused with function composition) is a way to combine simple objects or data types into more complex ones. ...
  en.wikipedia.org/wiki/Composition_(object-oriented_programming)

• In the visual arts — in particular painting, graphic design, photography and sculpture — composition is the placement or arrangement of visual ...
  en.wikipedia.org/wiki/Composition_(visual_arts)