kompozicija

1. (in music) composition; piece of music
   Orkestar je izveo njegovu novu kompoziciju. — The orchestra performed his new composition.
2. (in art, photography) composition
   Ova fotografija ima odličnu kompoziciju. — This photo has an excellent composition.
3. (on the railway) train; set of carriages
   Kompozicija je iskočila iz šina kod Niša. — The train derailed near Niš.
4. (in literature, writing) structure; composition
   Kompozicija romana je vrlo složena. — The structure of the novel is very complex.

For chemical composition, the make-up of a mixture etc. Serbian usually says sastav, not kompozicija.