What is meant by "diminution" in music?

Diminution in music refers to the technique of halving the value of notes, thereby making them shorter. This practice allows composers and performers to elaborate on melodic lines, often resulting in a more intricate and decorative version of the original melody. By reducing the duration of the notes, musicians can introduce rapid, flowing passages that embellish the primary melodic idea, adding complexity and variety to the music. This technique has historical roots, particularly in Baroque music, where ornamentation was a common practice to enhance the expressive quality of a piece. The concept of diminutive note values helps create a sense of movement and can significantly affect the overall feel of a composition.