One definition is a "performance given extempore without planning or preparation". Another definition is to "play or sing (music) extemporaneously, by inventing variations on a melody or creating new melodies, rhythms and harmonies".
What is an example of improvisation?
The definition of improvisation is the act of coming up with something on the spot. An example of improvisation is a set of actors performing without a script. That which is improvised; an impromptu. ... The act or art of composing and rendering music, poetry, and the like, extemporaneously; as, improvisation on the organ.
What is the improvisation of classical music?
'Improvisation' is generally seen as the creation and performance of a piece simultaneously in the moment, and suggests spontaneous play. ... Improvisations can also be based on a framework, such as a fixed bass line, or a melodic outline, with some 'precomposed' elements and some 'freer' elements, as in variations.