"Composed" refers to a state of being calm and in control of one's emotions. When someone is composed, they can handle stressful situations without becoming overwhelmed. This quality is often admired in leaders and public figures, as it allows them to make clear decisions and communicate effectively. In music, "composed" describes the process of creating a piece of music. A composer, such as Ludwig van Beethoven or Wolfgang Amadeus Mozart, writes down notes and instructions to convey their artistic vision. This process involves arranging melodies, harmonies, and rhythms to produce a cohesive and expressive work.