Origin: Latin suffix -tion
Masturbation has 2 different meanings across 1 category:
manual stimulation of the genital organs (of yourself or another) for sexual pleasure
"He chose to engage in masturbation alone before going out with his friends."
Manual erotic stimulation of the genitals or other erotic regions, often to orgasm, either by oneself or a partner.
"During their intimate moment, they engaged in mutual masturbation to reach a shared climax."
In plain English: Masturbation is when someone touches their own private parts to feel sexual pleasure.
"She decided to end her night with some private masturbation before going to sleep."
Usage: Masturbation refers specifically to self-stimulation and should not be confused with partnered sexual activity. It is commonly used in medical contexts when discussing normal human development without carrying negative moral judgments.
The word comes from the French term masturbation, which was formed by combining the root for "mast" with a suffix meaning "action." It entered English through New Latin as a way to describe the act of stimulating oneself.