What does "improvisation" mean within the context of music?

The term "improvisation" in the context of music refers to the spontaneous creation of music without relying on precomposed material. This practice allows musicians to express their creativity and respond to the music in real-time, often resulting in unique performances that differ each time they are played. Improvisation can take various forms across different genres and styles, showcasing a musician's ability to innovate and adapt.

This understanding of improvisation distinguishes it from other activities such as playing pre-written scores or rehearsing musical pieces, which involve following set compositions and prepared material. Additionally, while conducting a large ensemble is a vital musical skill, it does not encapsulate the essence of improvisation, which is fundamentally about spontaneity and personal expression in music-making.