Definition of prolusion in English:

prolusion

noun

archaic, formal
  • 1A preliminary action or event; a prelude.

    preliminary, overture, opening, preparation, introduction, start, beginning, curtain-raiser, lead-in, precursor, forerunner, harbinger, herald
    View synonyms
    1. 1.1 A preliminary essay or article.
      preface, introduction, prologue, preamble, opening remarks, opening statement, preliminary matter, front matter, forward matter
      View synonyms

Origin

Early 17th century: from Latin prolusio(n-), from prolus- practised beforehand, from the verb proludere, from pro before + ludere to play.

Pronunciation:

prolusion

/prəˈl(j)uːʒ(ə)n/