noun (n)

• neutering a male animal by removing the testicles(noun.act)

  Synonym:
  emasculation
  

  source: wordnet30
• surgical removal of the testes or ovaries (usually to inhibit hormone secretion in cases of breast cancer in women or prostate cancer in men)(noun.act)

  Example:
  Bilateral castration results in sterilization.
  

  source: wordnet30
• the deletion of objectionable parts from a literary work(noun.act)

  Synonym:
  expurgation
  

  source: wordnet30
• The act of castrating.(noun)

  source: webster1913