Definition of "masturbate" []

• To perform an act of masturbation. (verb-intransitive)
• To perform an act of masturbation on. (verb-transitive)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "If Ratzinger wants to stay in Italy and scare school kids by telling them God is watching when they French kiss or masturbate, that is his sexual silliness."
• "I stick my fingers in my butt when I masturbate, which is several times a day."
• "In Sunday's Observer, Baroness Warnock urged men who couldn't get sex for free to masturbate, which is not quite how it probably strikes the average punter."