exposition, expounding -- (a systematic interpretation or explanation (usually written) of a specific topic)
exhibition, exposition, expo -- (a collection of things (goods or works of art etc.) for public display)
exposition -- (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")
exposition -- ((music) the section of a movement (especially in sonata form) where the major musical themes first occur)