composition
US /ˌkɑːm.pəˈzɪʃ.ən/
UK /ˌkɑːm.pəˈzɪʃ.ən/
1.
the nature of something's ingredients or constituents; the way in which a whole or mixture is made up
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The composition of the soil affects plant growth.
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The chemical composition of the new material is still being analyzed.
2.
a piece of writing, music, or art
:
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She played a beautiful piano composition.
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His latest literary composition received critical acclaim.
3.
the act of writing something, especially a piece of music or literature
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The composition of the symphony took several years.
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He is currently engaged in the composition of a new novel.