Definition of "masturbate"

masturbate

/ˈmæ.stə.beɪt/

verb
third-person singular simple present masturbates, present participle masturbating, simple past and past participle masturbated
1. (intransitive) To stimulate oneself sexually, especially by use of one’s hand or a sex toy made for this purpose, often to the point of ejaculation or orgasm.
  Quotations
  The primary function of a souvenir fetish is so that the offender can relive the actual event within the context of the fantasy, usually while masturbating to maintain sexual arousal and achieve orgasm (Canter et al., 2004).
  2006, Catherine Purcell, Bruce A. Arrigo, The Psychology of Lust Murder, page 28
2. (transitive, colloquial) To stimulate someone else sexually without penetration of the penis.
  Quotations
  Mrs Intiasar’s maids often masturbated her in the morning. It wasn’t something she discussed with anybody, least of all the maids. In fact, she hardly thought about it.
  2021, Leone Ross, This One Sky Day, Faber & Faber Limited, page 293
3. (informal, derogatory) To stimulate or please oneself by means of anything, not necessarily sexual, that does not get them anywhere; something that wastes their time; something that does not help others or achieve any important goal.