Definition of "masturbation"

masturbation

/ˌmæstəˈbeɪʃ(ə)n/

noun
usually uncountable, plural masturbations
1. Manual erotic stimulation of the genitals or other erotic regions, often to orgasm, either by oneself or by a partner.
  Quotations
  Diogenes in sight of all, exercising his Masturbation, bred a longing desire in the bystanders, that in such sort they might fill their bellies by rubbing or clawing the same.
  1603, Michel de Montaigne, chapter 12, in John Florio, transl., The Essayes […], book II, London: […] Val[entine] Simmes for Edward Blount […]
  Masturbation is our first and natural form of sexual activity and if that's inhibited or damaged, then we suffer for the rest of our lives.
  Betty Dodson, (famous quote)
  Masturbation is fun and natural. Not to mention it's a great way to earn five bucks without touchin' the guy.
  2005, Jon Kimmel, Clum Babies (Drawn Together), season 2, episode 5, spoken by Foxxy Love (Cree Summer), via Comedy Central
2. (figurative) A vain activity.
  Quotations
  So call me antisocial, call it masturbationEither way, it's a solo operationI'm just far more comfortable alone
  2013, Days N' Daze (lyrics and music), “Misanthropic Drunken Loner”, in Rogue Taxidermy