the act of starting something for the first time; introducing something new

a preliminary introduction to a statute or constitution (usually explaining its purpose)

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

Replacement of the variables in an algebraic expression by their values in terms of another set of variables, The introduction of DNA from one cell into another by means of a bacteriophage or one of a variety of chemical or physical methods, The change of one metal into another; transmutation of metals, according to the alchemists