Composition is a noun with multiple meanings:
1. The way in which something is put together or arranged
2. A work of music, literature, or art
3. The act or process of producing a work of music, literature, or art
4. A short essay written as a school exercise
5. The nature of something's ingredients or constituents
6. In chemistry, the relative proportions of elements in a substance
7. In law, an agreement to pay a sum in lieu of a larger debt or other obligation