noun (n)

• manual stimulation of the genital organs (of yourself or another) for sexual pleasure(noun.act)

  Synonym:
  masturbation
  

  source: wordnet30
• a method of birth control in which coitus is initiated but the penis is deliberately withdrawn before ejaculation(noun.act)

  Synonym:
  coitus interruptus, pulling out, withdrawal, withdrawal method
  

  source: wordnet30
• Self-pollution; masturbation.(noun)

  source: webster1913