1. An explanation that is straightforward and clearly understood: The author provided a clear exposition of the meaning of his latest book of poetry.
2. A clarification of a subject, or topic, that may be difficult to understand: Celia consulted an encyclopedia about astronomy for a better exposition about the stars and planets.

Judge Smithson prepared a detailed exposition to explain the difficult decision she rendered.

3. A public exhibition, display, or show, consisting of artistic goods or words of art, etc. or industrial developments: The annual agricultural exposition will be held on the fair grounds near the large parking lot.
4. That part of a literary or dramatic work in which the basic facts of the setting and character are made known: The playwright provided a clear exposition of the stage scenery and costumes for the actors.