Done or undertaken of one's own free will, Supported by contributions or charitable donations rather than by government appropriations, Done intentionally but without premeditation or deliberation, as when under the influence of an intense emotional reaction, noun_ A short piece of music, often improvised on a solo instrument, played as an introduction to a larger work, A piece for solo organ, often improvised, played before, during, or after a religious service, music A short piece of music, often having improvisation, played on a solo instrument