meaning of exposition
1.  The act of exposing or laying open; a setting out or displaying to public view. 
2.  The act of expounding or of laying open the sense or meaning of an author, or a passage; explanation; interpretation; the sense put upon a passage; a law, or the like, by an interpreter; hence, a work containing explanations or interpretations; a commentary. 
3.  Situation or position with reference to direction of view or accessibility to influence of sun, wind, etc. ; exposure; as, an easterly exposition; an exposition to the sun. 
4.  A public exhibition or show, as of industrial and artistic productions; as, the Paris Exposition of 1878. 
5.  an account that sets forth the meaning or intent of a writing or discourse; "we would have understood the play better if there had been some initial exposition of the 
						">background"
						 
