English to English

noun (n)

• a short introductory essay preceding the text of a book(noun.communication)

  Synonym:
  foreword, preface
  

  source: wordnet30
• exercising in preparation for strenuous activity(noun.act)

  Synonym:
  tune-up, warm-up
  

  source: wordnet30
• A trial before the principal performance; a prelude; hence, an introductory essay or exercise.(noun)

  source: webster1913