adverb (r)

• (of childbirth) before the end of the normal period of gestation(adv.all)

  Example:
  The child was born prematurely.
  

  source: wordnet30
• too soon; in a premature manner(adv.all)

  Example:
  I spoke prematurely.
  

  Synonym:
  untimely
  

  source: wordnet30