Improvisation
WordNet
noun
(1) A performance given extempore without planning or preparation
(2) An unplanned expedient
(3) A creation spoken or written or composed extemporaneously (without prior preparation)
WiktionaryText
Noun
improvisation
- The act or art of composing and rendering music, poetry, and the like, extemporaneously; as, improvisation on the organ.
- That which is improvised; an impromptu.
- Musical technique, characteristic of blues music.